This is just like VVVVVV, except when you press the "flip gravity" button, everything else flips gravity instead of you. I know there's probably ten or twenty games out there that use similar mechanics, but the only one that comes to mind at the moment is LIMBO. And even then it more commonly used electromagnets instead of gravity.

The player-character is inspired by this webcomic.

Controls:
Arrows - move.
X - Jump.
C - Flip gravity.