The best indie games are the ones that immediately make you feel slightly unwell, clearly. Braid. Narbacular Drop. Space Funeral. Here's a new one with more in common with the gravity flipper VVVVVV than anything else - ibb and obb is an entirely co-operative platformer where players can leap through gaps in the floor to walk on the topsy-turvy version of the world. It's more than a little mind-bending watch two players solve the game's puzzles in tandem, as you'll see in the video after the jump. The full game's due out in early 2012.
Check this out, though. After receiving a 7+ age rating in Europe and 12+ in Japan, the American ESRB have given the preview build of ibb and obb a 17+ "Mature" rating, stating, among other things, that the "main characters sexual preference is perceived as ambiguous and not suitable for all audiences".
EDIT: Oh OK it's an April Fools joke. Wow it's even funnier being caught out by that stuff when it's not April 1st.