Graviter

Graviter is a real world physics based game about manipulating the gravitational forces. Shrink and enlarge bodies, move them around to find your way through over a hundred different levels of varying complexity.

You play as a comet lost in the galaxy trying to find your lost kitty back. For yet unknown reason - the cat left you parts of the galaxy's map. Only collecting all the parts will lead you back to the kitty. To do so you have to learn how to manipulate gravity to your side whlist obeying laws of nature. Exploit Newtonian equations to its limit. The kitty is waiting.