I really like the idea of this game! Trying to line up the ship to hit several ducks at once was surprisingly fun and engaging, and I can really see this becoming addictive with some more polish and upgrades and such! I survived until the fourth wave and then it became a bit too much to keep track of hahah, but still very fun!
As for criticism, I would have liked a bit more feedback when hitting ducks - like a low sound or such to know that I am hitting something! It was also a bit difficult to see what was going on when a lot of ducks were stacked on top of eachother, which happend a bunch on stage 4 for me. And finally, I thought the music fit the game well, but it was a little bit sharp for the ears heheh :b
All in all I did enjoy the game a bunch though - good job!!