This game is quite pretty with very nice graphics. Unfortunately, the graphics and building defensive turrets around the bases is all the main screen is used for. Gameplay itself is pretty much restricted to moving units from one base to another via the mini-map. All you can do is select 25%, 50%, or 100% of a base's units or select individual kinds of units rather than individual units themselves, limiting your tactical options. No sending sentries or guards in the middle of a channel. Additionally, each base only constructs one kind of unit. If you lose the one base that makes the cheap anti-unit guys, you are SOL. And no constructing your own bases either, you're stuck with the ones already on the map.
One of the biggest irritations is that units don't engage enemy units en-route unless they sail right on top of the unit, and even then they don't chase them. So a massive enemy force can sail right by your front-line bases with only a couple shots exchanged. So much for a defensive line.
The story is amusing if only because of its ridiculousness. Definitely not worth playing it for.
In the end, the game is just a grind of sending units forward, watching them die, building more units, sending them forward, and then back to retake a base, then forward again. Much better RTSs out there. (Also, for those saying it includes TD elements, sure if a couple pot shots as the enemy drives by counts as defense...)