Rock lines game jobs

I'm on the lookout for a proficient programmer in RPGLE (RPG IBM Series). The project has no strict deadline. I'm looking for a skilled professional with prior experience in RPGLE and game development. Please share your relevant experience and previous projects.

Record aditional linbes and deliver audio

I am offering source codes for 26 unique Android games ready for purchase. Having developed these games, I can guarantee their quality and potential. Potential buyers, such as a budding game developer or a gaming company, would find this extremely beneficial. Ideal Skills and Experience: * Familiarity with Android Game Development * Profit-oriented mindset * Interest in code acquisition * Game re-skinning capabilities would be a plus Since I missed out on detailing game categories and project timeline, I'm open to discuss these and more at the prospective buyer's convenience.

I'm seeking an experienced PCB designer to develop a custom ATSAMD21 Micro PCB board. - A USB interface, specifically pin header for most GPIO and USB D lines. - 10+ GPIO pins required for this project. The ideal candidate should have prior experience working with ATSAMD21 Micro PCB boards as well as an understanding of USB interface technology. Proficiency in board design and a keen eye for detail will be crucial for success in this job.

... I need all of the videos from “Jen’s Exercise Demos” copied over with the name, the video url and the howToTips into the correct columns. All of the videos are vimeo links so should have “vimeo” selected in the videoType column Many of the tips have multiple number bullet points, I need there to be 2 lines between each bullet point, as demonstrated in the example rows. Equipment and movement pattern columns are not as important but if you could also select them that would be great. If there is equipment clearly used then select it from the dropdown, it is likely to only be Dumbbell, Barbell, Bench or Resistance band The first sheet separates out the exercises by “movement type”, many of these coincide

I am searching for a skilled game developer with expertise in C++ and sufficient experience with the Unreal Engine to construct a modded APK for an action game. The desired modifications include: - Unlimited resources - God mode - Unlock of all levels - Customization The perfect freelancer for this project should have a deep understanding of mobile gaming, and proven experience in APK modding. Familiarity with action games will be a significant advantage.

I am in need of a talented programmer to assist me in building a casino website. The site will feature two main games: Coinflip and Crash. Key Features: - Coinflip: A simple, yet engaging game where users can bet on a coin toss outcome. - Crash: An exciting game where users bet on a multiplier before it "crashes", similar to popular gambling games. Payment Integration: - I'd like the website to support Credit/Debit cards, Cryptocurrencies, and E-wallets for a seamless user experience. User Account Functionalities: - The website should offer user registration and login options, as well as an account balance tracking feature. Ideal Skills and Experience: - Proficiency in web development, particularly in building interactive and secure gambling websites. - ...

I'm seeking a proficient Unity developer to help create an engaging vehicle simulation game centered around trains. The project involves building intricate locomotive models, creating immersive environments, and fine-tuning driving mechanics to provide players with an authentic train conductor experience. Key tasks include: - Development of 3D train models. - Creation of realistic environments. - Implementation of responsive controls to simulate genuine train handling. Ideal skills and experiences: - Intensive knowledge of Unity game development. - Proven experience developing vehicle simulation games. - Proficiency in 3D modeling and environments. - Strong understanding of physics for realistic movement and controls.

...talented mobile app developer to create engaging multiplayer games for both iOS and Android platforms. Key Requirements: - Multiplayer Functionality: The games should support online multiplayer capabilities to provide a competitive and interactive experience for users. with payment gateway integartions and the focus is on user engagement and gameplay. Ideal Skills and Experience: - Proficiency in game development for both iOS and Android platforms. - Experience in creating multiplayer functionality in mobile games. - Strong background in UI/UX design for mobile applications. - Familiarity with creating games like Ludo, Cricket, and Snakes and Ladders is a plus. Please submit your proposal with examples of previous mobile games you've developed, particularly with online m...

I'm looking for a skilled game developer who can create an exciting PC game for me. The game is centered around a character, Aviater, and their mission. The chosen freelancer will need to be capable of designing and developing the game from scratch and deliver it by the end of next month. Key Requirements: - Expertise in PC game development - Ability to develop a game from concept to delivery - Solid understanding of game design and mechanics - Strong communication skills and ability to work to deadlines The game will involve: - Action-packed gameplay that will keep players engaged - A compelling storyline that captures the player's interest - High-quality graphics and animations - Intuitive controls If you have a passio...

I have a substantial number of legal contracts that I need to analyze and retrieve specific information from. This is a two-fold task and requires proficiency with Microsoft Azure and its document intelligence capabilities. Your primary responsibilities will be: - Utilizing OCR to transcribe the contents of the legal contracts. - Harnessing Microsoft Azure's information extraction featu...document intelligence api with python code. As its a proof-of-concept a simple dummy dataset should suffice. Additionally, I have very little IT and coding background so I would need additional help in understanding the code and the relevant jargon. Please send quotes only if you can adhere to these requests. In case I am satisfied with the output, I have additional projects for you along simila...

Hey everyone, I'm on the hunt for a talented backend developer to join me on an exciting journey to build something truly game-changing! Here's the deal: I've been working tirelessly on the frontend of an innovative app called Arthwise using React Native. It's all about democratising financial expertise and empowering users with valuable insights to navigate the world of investments. Now, I need someone with backend wizardry to help bring Arthwise to life! This isn't your typical job post – it's more of a collaborative side hustle. We'll be building something together that has the potential to change the game in the finance world. What I'm Looking For: Someone who's passionate about building scalable applications. Ex...

I need a Flutter developer for a website, I want you to create an automation website that generates ( SMS iPhone videos ) the website is gonna be like this 1- there is an empty SMS template 2- the user adds the text in every part ( sender - receiver ) 3- click okay and the websit...Flutter developer for a website, I want you to create an automation website that generates ( SMS iPhone videos ) the website is gonna be like this 1- there is an empty SMS template 2- the user adds the text in every part ( sender - receiver ) 3- click okay and the website generates the video 4- the video has to be like that ( one message at a time, voice over for every message, background video game ) here is an example of what I want exactly: @

I'm looking for an experienced game developer to create an engaging simulation game aimed at adults, to be played on mobile devices. The ideal candidate will: - Have previous experience in simulation game development. - Demonstrable ability to create engaging, challenging, and entertaining gameplay. - Knowledge of leading mobile platforms and compatibility. - Expertise in coding and development tools. - Be able to work to a schedule, delivering progress updates regularly. Remember, the game needs to appeal to an adult audience so the complexity and sophistication of the gameplay should match this. Looking forward to seeing your portfolio and discussing the project's opportunities.

...wrap on the vehicles and trailer signs. Our main focus is the logo (name) but it would definitely be a bonus if the mascot could be designed also. We are not completely set in the design we have done up as an example, we are open to creative freedom in regards to the mascot, fonts and colours. If you feel inclined to add something like grass to the bottom of the lettering or something along those lines we would be interested to see your ideas. Ideal skills: - Expertise in animal-themed logo creation, particularly emu design - Proficiency in cartoon character design - Strong lettering design capabilities - Adeptness at adding depth and dimension to logos - A great eye for color balance; though the color scheme is not yet decided, your input and creativity are welcomed! Look...

Hi, I want to make a Casino game website where users can register and play all type games and as admin i can manage all things. example web Thanks

Ive been making music for awhile now, but my masters are always always lacking. I am getting close to finishing a project currently, and would like to have someone else do the engineering. If you would like to listen to my previous work, my artist name on Spotify is arkenstoner

I will not respond to generic responses. I have a Wordpress website that I need information added to. I also want all the information moved into a new shopify website as well. I have a scrape with information and part numbers that will cross over to some of my existing listings. I need all this information added to my Wordpress website and then the left over lis...numbers that will cross over to some of my existing listings. I need all this information added to my Wordpress website and then the left over listings from the scrape also added to my Wordpress and shopify websites without a price. I also need some minor adjustments made to the descriptions on the Wordpress website for seo purposes. I currently have approximately 3000 lines on my Wordpress site and the scrape has 200...

...games. Further specifications of the game type were left open-ended, so any genre from collectibles, role-playing, to strategy games may be considered. Are you currently working on a Web3 Game? Did you already finish making a Web3 Game? Do you perhaps worked on a Web3 game before and own the rights? We are interested in 1. buying the code and rights 2. Or listing it on our platform This is a unique opportunity where you can sell your existing Web3 Gaming Project to us or list it on our platform. Write down the following: -Platform(s) of the game -Technologies you used to make the game -Concept and type of game (5-10 sentences) -Price estimate I'm NOT looking for someone to build a game from the start!!! You have to have...

I'm looking for a creative visionary to design 10 abstract yet symbolic faction logos for our role playing game. It’s essential your designs capture the unique feel of each faction while contributing to the overarching aesthetic and unified visual narrative of our game. Key requirements: - Completely new designs: We're specifically seeking designs that are distinct from the existing ones listed on our website. - Abstract and symbolic: The logos should be insightful and subtly allude to the faction's ethos or history. - Consistent, yet diversified visuals: Each logo should be unique, yet form a cohesive set when considered collectively. Preferred Skills and Experience: - Strong artistic vision with a portfolio of abstract logo designs. - Understanding ...

I'm looking for a Python script that uses PyAutoGUI to control keyboard inputs, with a specific focus on interacting with a Firefox web page. I am open to creative ideas on how to do this differently then I have described below. Key Requirements: This is basically like a macro, or autohotkey, (if you do a gui then I can determine the winner as soon as whoever finishes first with working code, wins. The gui for the python code is up to you but maybe it could work well if I can have section one establish focus on right scrolling panel and ignore the left panel. Second section: because this is sendkeys basically we will use the keyboard to navigate. A text box stating how many tabs until we get to the first web object button to select, Then a second text box to state how many tabs ...

As the author of a children's book aimed at the 0-3 year age range, I'm seeking a talented illustrator, or someone with limited experience but a great talent match, to help me bring to life what's been in my head. Starting with around 21 pages but open to input and possibly less. Looking for engaging, warm basic black lines with fill in watercolors; light and airy, and cheerful. Key Requirements: * Playful watercolor artistry, kid-friendly style that appeals to the targeted 0-3 years old child. * Willingness to work with author to interpret what's in my head. Looking for someone to help bring my book dream to life. * Proficiency in creating visually appealing, light, and positive images, maintaining consistency throughout the book's entirety. * Ad...

I'm looking for an experienced web scraper to access and download specific information and images from the Used Inventory section of the White Rock Honda website. Here are the specifics of what I need: - Car make and model - Year of the car - Price of the car For each car listing, I need ALL available images downloaded. Furthermore, I require the images in JPG format. Candidates applying should have successful experience in web scraping, data extraction, and handling myriad images. Efficiency and accuracy are critical for this project.

Hi! I'm in pursuit of a graphic designer capable of delivering an alternate version of my existing logos. The primary reason for this isn't that there's a particular issue with current designs, but simply my wish to explore an update that reflects a modern aesthetic wi...fresh take on the existing logos - The ability to incorporate a slightly distressed look A modern twist that maintains recognition of my brand is the goal. If you are proficient in crafting fresh, modern logos with a slightly distressed touch, I'd like to discuss this project with you. I've attached a distressed weathered looking Modelo logo as an example of what I like. Something like a 1990's rock t-shirt style. The three Goose Port logo's I attached and want changed are av...

I am looking for a Python programmer with a math background (statistics) who can help calculate the optimal strategy and house edge for various permutations of a casino card game similar to blackjack.

I am looking for a photographer (open to any skill level) to attend the San Antonio Brahmas home game(s) with me to take photos of me and other fans that like to take pictures with me. I am an upcoming Super Fan that attends games in a fun and cool Bull costume. Recently started an Instagram page for it here @sabrahmabull feel free to check it out. Some pictures of me in the costume at past games are also attached. Your key tasks would include: - Taking candid photos of me at the game and tailgate. - Taking photos of me with other fans. - Capturing engaging portraits. - Snapping memorable photos of fans at games and tailgate events. I am open to working with someone who is established or just getting started and looking to grow their portfolio. Offering a blend of creat...

Design: The logo consists of a distinctive symbol that forms a contemporary geometric shape. The symbol depicts a small network of intersecting lines symbolizing communication and interaction between users. The geometric shape could resemble a grid pattern or a crosshatched spiderweb. Colors: Vibrant and bright colors are used to convey vitality and innovation. A contrasting color palette can be employed to attract attention and enhance memorability. Fonts: Choose a modern and clear font that is easily readable on various devices. The font should be attractive and represent modernity and innovation. Message: The logo should convey the idea of communication, exchange, and interaction in the virtual community. It should serve as a catalyst for exploration.

I'm looking to set up a Minecraft 1.16 server focused on mini-games. Initially, I'd need 4-6 mini-games to be developed. Key Responsibilities: - Configure and set up a Minecraft 1.16 server - Design and implement 4-6 engaging mini-games - Ensure the server's smooth running and performance Ideal Skills: - Proficiency in Minecraft server setup - Proven experience in mini-games ...understanding of Minecraft 1.16 mechanics - Ability to manage and maintain server performance - Creative problem-solving skills to enhance player experience Looking for a dedicated and experienced Minecraft developer who can not only set up the server but also create fun and unique mini-games within it. The goal is to attract and retain a strong community of players by providing a variety of entert...

I'm after a seasoned Unity Game Developer who is well-versed in creating engaging physics-based brawler games, similar to "Fall Guys," "Party Animals," and "Gang Beasts." Utilizing Unity and Photon engines, the project necessitates the construction of a multiplayer game specifically tailored for PC. Desired Skills & Experience: - Proficiency in Unity and Photon Engine - A strong portfolio featuring cartoonish game art - Past work in developing physics-based brawler games - Experience in deploying games for PC The game's art style will be predominantly cartoonish, mirroring the light-hearted tone and aesthetic of the reference games mentioned. The potential for in-app purchases integration still hangs in the balance and w...

I'm in need of someone who can create 3D assets for me. I'm specifically looking for both indoor and outdoor assets for a video game. These will be used in a general gaming context, so a mid-poly level of detail is required. Key Requirements: - Creation of both indoor and outdoor 3D assets - Targeted for video game development - Mid-poly models suitable for general use Ideal Freelancer: - Proficient in 3D modeling - Experience with game asset creation - Able to create detailed models suitable for gaming - Knowledge of mid-poly modeling techniques - Prior experience with creation of both indoor and outdoor environments

I'm looking to expand on a project to expand on a VR scene which is just a single busy room by adding delightful details. The project is in Unity and running standalone on the ...low detail exterior environment, (not skybox) * an animated fan * a soundscape with spatial audio * a rain version of the scene * a cat with multiple animations, (sleeping, looking over, swishing tail, being pet) * some soft particles If you have any other ideas you think would work well I'd love to hear them. I'm looking for artists with experience with audio, rigging, and animation, especially game designers or animators, but also with a eye for level design and creating a pleasing environment. Timeline is a couple of weeks, let's make something we can both be proud of. attached are ...

I'm looking for...a Texas Hold'em game for mobile with an online multiplayer option. It should have 3D graphics. Key requirements: - Develop a Texas Hold'em game for mobile platforms with high-quality 3D graphics - Implement online multiplayer functionality - Ensure smooth gameplay and user-friendly interface Ideal skills and experience: - Proficiency in game development for mobile platforms - Experience with online multiplayer game creation - Strong understanding of 3D game design and graphics - Ability to ensure smooth and bug-free gameplay. Please include samples of your previous work in your bid. The level of quality of the game should match this game: please see attached file for the full SoW for the game

I'm seeking an experienced developer to create a custom plugin for my PC-based Minecraft server. This plugin should integrate with a pre-existing Discord server, designed to notify me whenever a player executes a specific command in the game. Requirements: - Develop a custom plugin for my PC-based Minecraft server. - The plugin should have a feature to send notifications to a pre-existing Discord server. - Notifications should be triggered whenever a specific command is used in the game. The ideal candidate should have: - Proficiency in Minecraft plugin development. - Familiarity with integrating plugins with Discord servers. - Ability to design a notification system.

...Abstract (9-10 lines): Research area: Briefly explain the area your research focuses on. Problems: Identify the key problems existing in the research area. Solutions: Briefly mention the solutions your research proposes. 6. Introduction (20 lines): General overview: Provide a broader introduction to your research topic. References: Include at least 5 relevant references. 7. Motivation (5 lines): Problem and solution significance: Explain the importance of addressing the problem and the potential impact of your solution. Research benefit: Briefly describe how your research benefits the field and its purpose. 8. Related work (40 lines): Summaries of 5 research papers: [Paper title 1]: Briefly summarize the paper in 8 lines. [Paper title 2]: Briefly s...

I run a Silicon Valley based early-stage tech startup that is branching out into the event marketplace. My vision is to create a user-friendly platform that caters to everyone, disregarding their age or professional background. I am looking for an exceptional UI/UX designer who has a commendable portfolio and prior experience in creating distinctive and interactive d...be perfect. Our model design is essentially like Airbnb. The ideal candidate for this position would have excellent design skills, a deep understanding of user experience and a knack for visually appealing and intuitive design. Experience in designing marketplace websites or similar platforms would be highly appreciated. I look forward to seeing your portfolio and discussing how we can create a game-changing platform...

I'm in need of a complex script that combines SMC schools, ICT schools, and commercial use elements into a single Tradingview indicator. Here are more detail...SMC and ICT trading methodologies - Knowledge of classic trading indicators and strategies - Ability to create clear and user-friendly script documentation Experience with liquidity tables and Vortex editing would be an advantage. Please only apply if you are confident in your ability to meet these requirements. For clear information Smc and ict also automatic fibonacci +trend channel + trend lines with SR liens + stock and crypto and forex liquidity table+ dashboard table with major information from rsi and Vortex also macd and Ema 50 also Ema 200 + trend status with multiple frames all in one with control panel can...

For the game Dead by Daylight, I would like someone to create an equalizer to isolate the sound of a specific character, and amplify that sound so its easier to hear. The sound is comparable to breathing but is more like a distinct grunting sound. At the same time, I would like the equalizer to decrease the sound of the ambience/ chase music to make the sound stand out even more. There will be 3 different equalizers, with 3 different sounds at the base. The end goal would be 3 files for peace equalizer I can download. I will provide all the input, so I can send all the audio files required to make the EQs. Looking for a developer who knows how to utilize programs to translate sounds into Hz ranges & into eq's + ideally other advanced techniques I dont know about.

As a burgeoning project in demand, we're in need of a Full Stack PHP Developer with a good command of both frontend and backend development. For our backend development, we prioritize: - Proficiency in PHP, MySQL & Laravel When it comes to the frontend, we value: - Experience with Javascript & Web Designing using HTML & CSS. Knowledge on VueJs wil...development, we prioritize: - Proficiency in PHP, MySQL & Laravel When it comes to the frontend, we value: - Experience with Javascript & Web Designing using HTML & CSS. Knowledge on VueJs will be Plus. We're specifically looking for someone at an intermediate level, who has: - A solid grasp of Javascript & PHP. We're excited to welcome a competent, committed developer to our team. Bring your A-...

Hi, I want to make a Casino game website where users can register and play all type games and as admin i can manage all things. example web Thanks

I'm in need of a professional who can develop a website for me using Node.js. The website will be to trade Counterstrike game skins on our website. Please view our two resources provided which is what i could find. We want to use and update this code and application to newer counterstrike 2 and maybe find new features and techniques to build the website. We need a developer that can assist us with designing, developing, improving and deploying the website to our server. Please have a look at the two references and go through it so we can discuss options to improve it and update it. Competitor website -

I'm on the hunt for an expert game designer to develop a new, hyper casual game from scratch. This should be a fresh, exciting offering for users of all ages, catering to children, teens, and adults. Key details: - This game will be platform flexible: the designer should have experience in developing for both iOS and Android systems. - Our target audience spans all age groups, so the game should be appealing and engaging across the spectrum. - Given our hyper casual theme, the game should be simple, addictive and easy to play. The freelancer should balance simplicity in mechanics with exciting game dynamics. Ideal skills and experience: - Proven experience in game development is a must. - Experience with iOS and Android platform dev...

NEED A QUOTE FOR THIS GAME: *BABYCHICKEN Farm Game: Cultivating Connections and Crypto Knowledge* *Game Overview:* BABYCHICKEN Farm Game is an innovative farm simulation game that marries the charm of virtual farming with the cutting-edge world of cryptocurrency. Players are immersed in a vibrant world where they can cultivate crops, raise adorable animals, and engage in a dynamic economy using the game's native memecoin, BABYCHICKEN. Designed for global connectivity, the game offers an inclusive and educational experience, promoting financial literacy and sustainable practices through entertaining gameplay. *Key Features:* 1. *Community-Driven Gameplay:* - Players can work together to build flourishing farms, with options to visit, ass...

I am in need of a specialist who can set up a DayZ server for Xbox, with in-depth knowledge of the DayZ game mechanics and server maintenance. Here are the specifics: - OS: As my console of choice is Xbox, I require someone who can effectively deal with a server setup on this console. - Mods: I am looking for custom mods. It would be highly advantageous if you have experience in customizing mods fitting to the specific needs of the players. The ideal candidate should have solid experience in DayZ server setup on Xbox, and extensive know-how in custom mod implementation. Sound knowledge in maintaining and troubleshooting Xbox servers would be a plus. Please, detail your experience with the above criteria in your proposal. Let's make a thrilling DayZ gaming experience together!

I'm looking for an experienced graphic designer that can help me create a cool poster in the style of the classic game Streetfighter. Key Requirements: - Create a retro-style poster based on the game Streetfighter. - Replace the game characters with real pictures, but maintain the original retro design. - Completed in 4 days. Ideal Skills: - Graphic Design - Poster Design - Ability to replicate retro styles - Proficiency with design software.

I am in need of a graphic designer with the skills to turn an existing photograph into a realistic, monochrome pictogram. This project is to enhance visual communication. The ideal graphic designer for this job would have experience in: - Pictogram creation - Working with monochrom...pictogram. This project is to enhance visual communication. The ideal graphic designer for this job would have experience in: - Pictogram creation - Working with monochrome color schemes - Rendering realistic designs from existing photographs - Understanding visual cues and using them to enhance communication. The color scheme for the project should be monochrome. I want the building only in lines. Your portfolio showcasing your previous pictogram projects would greatly assist me in making my...

...expert JavaScript game developer to build an engaging, endless runner mobile game themed on a food delivery courier navigating through an urban environment. Key features are: - Character Mechanics: The runner must be able to avoid obstacles, collect power-ups and coins, and swipe left or right to change lanes. - Urban Setting: The game takes place on busy city streets, and should depict a vibrant, setting to enhance engagement. - Integrated Ads: Merchant ads should be integrated into the game as banners on the buildings within the cityscape, to ensure smooth and non-intrusive monetization. Ads will be managed as videos, GIF, or images from the backend. Preferably, you should have prior experience developing endless runner games. A sound understanding of Ja...

at the lowest level of advancement, let's hope only 80% of the requirements are included in the application ;) Subject: Application for booking parking spaces. Design (in Android Studio) an adequate user interface (visual layer, navigation, i.e. transitions between screens, animations) The application should contain (at least): - Welcome ...(discs, files or similar), also known as the gallery (the gallery can be freely adapted to the theme of the application) - Adding a new item to the gallery screen (non-functional) - Focus Screen (e.g. presenting a new application feature) - Personalization/change settings screen - Characteristic Screen (e.g. if we are creating an application similar to Spotify, it is a music playback screen, if a game or library, it is a gameplay or book d...

...next time we play the game Than i have to create bundle of all the images, sounds and stuffs used in game so that user can download them from our server I have to make sure that the script names for two different project should not be same under same namespace, so i have written editor script to change all the namespace for the project-specific scripts Then, i have to check if games are fetching aseets from method because we will have no resources folder in project, since we are dwonloading the assets from server i have to fetch the assets from asset bundle. So if they are not downloaded, download them Different games uses different physics settings in project settings, so before each game starts, i set the physics settings according to the specific game...

Looking for an experienced character ...for an experienced character animator/ game programmer that has the skills to polish and finish an existing game coded in Unity. You must be very proficient in Unity game engine. Rigging and animation experience is a must. I need a rigging and animation expert as a matter of fact. We are working on a AAA on the rail game game in 1st person shooter style. I need someone who is good at taking existing assets and customizing them and making them better or using the existing animations very nicely. No rookies please. You will be asked to perform a test animation upon getting the full job, so if you are lying about expertise you will be wasting both of out time. You will also be working in Github with another Dev tha...

I need an experienced VR developer, immediately available, to help me create a VR game for Android and Google Cardboard. The project essentials: - Developing an engaging VR gaming experience - Optimization for Android and Google Cardboard VR platforms Ideal skills & experience: - Proven record in VR game development - Proficient in Android development - Experience with Google Cardboard is a plus This is an urgent project, so I need someone who can start as soon as possible. Your previous VR gaming portfolio will be key in my selection process. Quick turnaround time is essential. the project is about virtual reality snake phobia. i already created aquarium and snake. but the snake cannot travel inside the aquarium