Mystery online game

I'm 18 now. When I was around 8-10, I played an online game that I liked. All I can remember of that now is that I needed to avoid robots, not destroy them. Unfortunately, I can't seem to remember anything else, other than a planet similar to Saturn showing up once in a while. Can someone help me? Also, if anyone knows which game it is, can you tell me if a site still has it today?
Asked Mar 13, 2014
Edited Mar 13, 2014

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