Galcon Fusion is a micro-RTS, where you take over planets with ships and eventually conquer your opponents' forces.
I'll start off with the good. This is a simple game that's very easy to learn, and the simplicity of the graphics really helps. The battles are won or lost purely by numbers: troops will kill eachother one-for-one. As a result, battles come down to who can produce troops the quickest, and that will be the player with the most planets. It can lead to some interesting strategies... I had a three-way game where I held the most planets while being bombarded by the full might of the other players. Keeping my planets was a back-and-forth struggle, because I had to retake my planets within seconds or die a quick death, eventualy getting the smallest advantage that I could use to take one more planet.
Now, for the bad. The levels are randomly generated, which adds some diversity, but is often unfair. While there are many game modes, they still boil down to the same basic gameplay, and it gets repetitve (with added frustration from bad maps). And the controls are terrible on a PC. I played this on a tablet, and it was a little better, but I yelled at my computer a few times when I couldn't do what I wanted. This game requires quick thinking and rapid movement. It requires what StarCraft players would call "good micro strategy". Moving from one planet to another with clicking is fine, but dragging was unreliable (required to move troops to an allied planet). Multi-selecting planets is really useful, but double-clicking and box-dragging were both unreliable as well. It really sucks when you know what you want the game to do, but the game refuses to do it.
Also, the sound is slightly annoying.
Overall, This game is a fun diversion for a few hours, and not much more. I probably wouldn't pay over a dollar for this. There are plenty of games of similar quality on Kongregate (though I don't think those have multiplayer).