Minimal Mario
My project will be more of an art toy than a game. It'll use Qiskit (a Python framework for quantum computation) to make and manipulate images.
I'll limit myself to quantum programs of 6 qubits (no more and no less) to incorporate the theme. This will mean that the images will be limited to 2^6 pixels. In a quick test before starting coding, I found that this is only just enough to make a Mario.