Hey, if you already have the idea and a working prototype we can improve it, making it a multi level game, with a minimalist story, more art in the same style and all the puzzles you mentioned.
I just finished updating 2 of my own android games to work in different resolutions, with different graphics options, different aspect ratios and even with some accessibility options.
1 is a Puzzle game with 75 levels, the other is an Air Hockey game with various enemies (you can check it on my profile).
But I have to tell you, no one is going to make a full game improvement for ₹600.00 – 1,500.00 INR in a week, you know the quality will be very low.
Consider my bid if you want to go All In.