Flash Game: The Space Game

Exciting space RTS from the developers that brought you Vector TD.
Note: Only Mining & Survival modes are high-score enabled.

The Space Game is a single player strategy game that features 9 missions: 4 mining, 3 survival and 2 bonus modes.
The tutorials on the first page of the menu are an excellent place to start. They will teach you how to mine for minerals, expand, and defend yourself from space pirates.

I think 21 minutes was the best I've done so far on survival mode.
Play The Space Game at Candystand