Complete 2D Game Design

I’m developing a 2D mobile game where the fun comes from playing. What I need now is the full design foundation: a clear set of rules, a rewarding progression loop, and the systems that turn simple taps into long-term engagement... (Budget: ₹37500 - ₹75000 INR, Jobs: 2D Game Art, C Programming, Game Animation, Game Asset Creation, Game Design, Game Development, Game Programming, Game UI, Python, Unity 3D)