Throw me with programming ideas!

I need some help everyone! I’m yearning to program a new game, but I’m all out of ideas :’(
I feel like I need something new and exciting to work on and I’m asking YOU to throw any ideas you have (No matter how crazy, everything goes).

All I have planned out currently is that I want to make a 2d game and I’d like to implement some server/client action, where the server would run on my Raspberry pi.

So feel free to throw in any cool game mechanics and ideas and anything you think that could be used in a game.