You aren't allowed to use unity, unreal engine, godot, etc. You are allowed to use librarys/frameworks like pygame. Something that allows you to put sprites on the screen and/or play audio. (If you want to do something 3D, use something that allows for that. As long as you don't use a game engine)

(No, Scratch isn't allowed)

There is no theme since I already set a limit by forbidding game engines ;)