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I like to make a App, similar like Quizduell or Ruzzle. The graphics are supposed to be similar, even as bright and inviting and also the gameplay should run as smoothly. The gameplay is actually the same just that you have to type in the answer. It would need an iPhone / iPad version and an Android version. Then you would offer the game free with ads and one without advertising in the lowest price category. It's really important that it looks professional and not cheap.