Awesome!
(OBS: I usualy don't write reviews, also, I'm Brazilian, so sorry for any grammar or spelling mistakes)
Wow, I just can't imagine how much work you put in the making of this game.
Seriously, you could easily make a lot of money if you made an online (gunbound-style) version of this game. It's simply more fun than most comercial online multiplayer games! I really wish I could play this with my friends, on a LAN or something...
It's too bad I can only fight against computer-controlled oponnents.
If there are any flaws I'd say the AI sometimes is too dumb, even on the highest difficulties, and there is no option to turn off the music, while I actually enjoyed the music, I deducted some interactivity points because of that. Also, some weapons need more balancing, like the cannon balls and the atomic bombs.
Other than that, awesome game.
PS: I really hope the university you are joining has something to do with game programing or just flash making, because you have quite a lot of fresh ideas. ;)