Gravity Oddity is a roguelike game that plays differently than other games in its genre.  Instead of improving yourself every time you die, you actually improve yourself with every completed run, unlocking new game modes and mods.  While each run isn't necessarily that long once you know what you're doing, getting the hang of the controls and mechanics can be a real challenge, especially when a lot is happening on screen.  Once you can master that though, you'll find a game with a lot of customization, challenge, and replayability that's good to play in small bursts of time.  Strap on your gravity boots, save your roommate, and pay your rent.