Naught

Naught is a stylish cat who must traverse 40 black-and-white underground levels, collecting diamonds and avoiding deadly obstacles along the way. As you play, you unlock pages of a short comic book which explains the game story. But you do not control Naught directly -- the silent hero always walks or falls according to gravity. The trick is that you can rotate the whole environment around Naught, changing the direction gravity operates.

The game was designed to use the gyroscopic capabilities of the devices it works on -- you actually rotate your phone or tablet, so the in-game gravity aligns with the real-life downward direction. If the player so chooses, more traditional ways of controlling the game are available (drag to rotate, or press virtual buttons to rotate clockwise/counter-clockwise).

Besides the story mode, each level can be replayed in a Time Trial mode.