So... The thing I always complain about when playing jam-games is that in most cases you have either a good Idea or a polished game. Which makes sense since you have more time for polishing when the idea is not that original.
But this game got both! The idea is good AND you somehow managed to create all these (very nice) graphics. You have my deepest respect for that.
Only thing to complain is that it got difficult really fast and nearly impossible to manage (or maybe I was doing something wrong). After building the cannon ship suddenly 10-15 other cannon ships approached me and destroyed my cute little ship.