Join the Black and White Jam. 
The main condition is to create a game that uses only these two colors. You can create a game on any game engine (unity, godot, unreal engine, game maker, and others) or just write a game in any programming language. You can create a game alone or as a team. Basic requirements for the game: the graphics should preferably be black and white, the game should use the jam theme, it is desirable that your game can be played in the browser. You can also create a game in any language.