GravPull is a simple gravity based game. You start a level rotating around a planet and must add thrust to your ship once you think your angle of rotation is good for the direction that you intend to travel in. Each level has a goal planet that you must reach to pass to the next level.
Rotate the ship using a, d or left and right keys. You add and remove thrust to your spaceship using space. Add thrust to launch the ship from a planet's orbit. Remove thrust while in flight to avoid arriving too fast at a planet and crashing into it.