On an unrelated note,
Downwell is $1,49. Buy it.
Listen to this man.
It's an absolute steal at that price. Hell, it's a steal at $3. It's not a super deep game. You fall, you shoot, you stomp on stuff, but it's one of those games that just nails how good everything feels.
For those who don't know what the game is, you're falling down a series of vertical levels, can only shoot down, and can stomp on most enemies. The game starts to really get fun when you start getting good at comboing. You see, whenever you shoot (which can only be done in mid-air), you get a little boost. Not enough to fly upwards, but just enough to slow your fall. When you stomp on an enemy, your ammo refills. This means that with enough practice, you can keep a kill combo going by shooting to slow your fall enough to steer over and stomp on stuff, get the ammo refill, fall some more, slow down, stomp some, shoot at the enemies that can't be stomped, and so on.
The best part is that once you start getting combos over 10 or so, a positive feedback loop develops. Larger combos reward you with health refills and boosts to your maximum ammo. So doing long combos makes it easier for you to do even LONGER combos.