Once in Space is a gravity-changing puzzle platformer set in space. Your goal in each level is to reach the flag, but first you must collect all of the stars in the level. You can only collect stars with arrows that are pointing in the same direction that gravity is pulling you. Gravity changes when you walk over a red corner. Once all of the yellow stars have been collected, you can complete the level by touching the flag. If you're up for a challenge, try to collect the blue stars.