Interesting game. It looks like a simplified version of battle scenes in Pirates! (an old computer game which came out on C64 and other platforms of the old days). If you (gameinabottle) know what game I'm talking about, you might want to check it out for features you can add into future versions. For example, raising and lowering sails, and maybe even raiding land.
Boring... sound wasn't great... graphics were good and controls were great. Very responsive despite the amount of stuff going on at the same time. But, overall... boring.
Liked the concept, but not very challenging. I'd suggest, strongly, that you add a reset button and a level select. Also, I wasn't thilled about "Hard" identical to "Medium" except for it being a timed game. 2/5