What a fascinating game!
I have to admit that, though this game has very simple rules, it can be quite challenging at times. On top of that, the various units add some very interesting twists to an already interesting experience.
For example, the missile frigate's ability to shoot around corners proved to be a unique advantage when playing as a Human, and the fact that the Klosian ion cannon can literally shoot all the way across the board forced me to keep my eyes open for possibilities. Also, the first time a ring of the board failed to rotate when playing against the Sodinar, my jaw almost dropped! (It was especially annoying because it left a repair platform fixed in place next to the Sodinar warp gate.)
I considered dropping my rating to 4.5 stars for the buggy AI, but then I figured that if the AI was always so smart, it would be a much more difficult game.