The music was a great touch (got blasted in the ears by When Johnny Comes Marching Home) and the art nice, but the information coming in was a little too much for me to handle all at once, and in the end I kind of just cheesed it by having my 2 Man O' Wars both concentrate and blast at enemy ships one by one, taking them out before they have any chance to retaliate.
I also feel this is one of the few games I have played so far that would benefit from having a slower rate of gameplay. Perhaps a turn based system that would tell you what your and the enemies ships are firing next would allow for more strategy and planing (you still dont get to control what they are firing ), where you can then press a button and watch the exchange happen before repeating.
Overall though, definitely not perfect, but also definitely not without potential. I hope this gets developed further. Good luck!