This video showcases 20 games made in a weekend all on the theme "Roles Reversed." Play as the shopkeeper in an RPG, the bricks in a brick breaker, or the obstacles in a platformer. I think you could make an entire game studio based on this theme. Love it! (h/t @stublag)
This guy made a "Tiny Mac" with a 3d printer, a Raspberry Pi Zero 2 W, and an emulator. It's pretty rad!