I made a game for the Badger 2040 called Badger Dungeon.
I realized since I can save state on the Badger 2040, I can make a game with it, so I made a dungeon crawler. Making this was a lot of fun and the hardware limitation meant I can actually finish this project. The code is open source so check it out if you want to. I also made a Gameboy Advance style instruction booklet as a fitting throwback for explaining how the game works.