Check out the video demo here: https://www.youtube.com/watch?v=ofBBX9taPCI
Have you ever wanted to relieve stress by smashing planets together? Well now is your chance, you can select from several planets and create precarious orbits by dragging them around and altering their velocity. Then choose from several particle emitters to see what happens when you release swarms of multicolored particles in orbit around the planetary system you created.
Also a really cool way to learn about physics and orbital mechanics.