Gravity: playing with orbits description

Gravity is an orbits simulator. Set the position of attractors, repulsors and many other objects to set the orbit of the planets.
Can you make it enough stable to progress to the next level?
The gravity of the attractors changes the orbit of the planets. And there are repulsors too, with a negative gravity that push the planet out of orbit.

• Use all the attractors provided to pass to the next level
• Positive gravity attract planets, negative gravity repulse them
• Orbits leave traces, so you can plan your next move
• 35 levels (and more coming), when you proceed more objects are introduced. Attractors, repulsors, multiple planets...
• Play a game with minimalist graphics with relaxing classical piano