'How to build an app with 2D graphics on Android?

I want to build an app like this for Android using Kotlin, but I don't know where to start. It's not a game, but it has sort of gamification, so I don't know if it's ok to use a game library like libGDX.

Also, I want to build something as simple and easy as possible, 'cause I have no time and less than a year of Android experience.



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