Yeah Colony is pretty good but it gets a tad boring after awhile. I'd give it a 9/10. The reason it isn't 10/10 is 'cuz of the repeating of it and a little bit the game play style that you can't position them in kinda a 3D thing where you can place units farther back on the field and at different places on the length of the field.
I like colony probably the best. There are others that are a lot of fun, but with the multiplayer Colony wins out imo. It lets the game stay fun even when you've played it a lot, with all the modes and playing with different people.
Unreal Flash 2007, Epic War 3, Stick War, Warlords, Age of War, Bubble Tanks 2, Colony, Platform Racing 2, Epic Battle Fantasy 2, Field Command 1 and 2, and Dolphin Olympics 2 are all games you should try.
There's alot of semi-good games, Sin Mark if you like confusion at the beginning, Juggerdome if you can handle the glitches,and The Last Stand 1 and 2 are both very good games.
Unreal Flash 2007, Epic War 3, Stick War, Warlords, Age of War, Bubble Tanks 2, Colony, Platform Racing 2, Epic Battle Fantasy 2, Field Command 1 and 2, and Dolphin Olympics 2 are all games you should try.