If you like restrictions like use 1 color in game or 1-2 buttons for input and so, then this jam is definitely for you. 

You have to create a game which uses only 1  choosen shape at a time, that also means you can show only 1 object at a time , you can change size, color of shape but you can't change the shape. 

Themes are: find non-differences; Infinity tunnel; hmm good theme yes. It would be great to; gas mask

Choose these or whatever you like themes and create a game with them

Good luck everyone!