Algodoo

A simulation that shows how planets develop from materials (partially).

In this example, you are a core that collects material, and slowly grow more larger size, but there is a limit. There is a Spinning Star in the middle of the Map that recycles everything, you can control over the blue core and maybe survive for a long time and collect more materials ! There is 16 more Cores in this Map, you can merge or crash into them to get more gravity and collect more materials. Next to the Map, there is a rating of core developments ( size, number of core, etc...).

Enjoy and play !