Gravity: Friend or Foe?

Gravity: Friend or Foe? is a physics-based puzzle game. You can move the sun with your mouse but the planets can only be controlled through gravity. Gravity is both your friend and your foe. You should keep your planets inside the screen but you shouldnt let them touch the sun. Collect power-ups and try more dangerous maneuvers for more points. You can find the source code of the game here.