Yarr! Always love a ship-themed game :)
I thought this was an ambitious game for a solo developer, as the mechanics are quite complex. I enjoyed taking down the other ships and the slow pace simulated a little realism on what ship battles potentially should feel like.
I appreciated the sound effects you used which brought me into the theme of your game. I felt the music might have a been a little repetitive as it went on, a change of music among different levels could help the levels feel more unique as you go through.
Very cool concept.