Dude, I mean this when I say that I LOVE the gameplay. This is the first time I've seen a tower defense game of this style, and I love the feeling of shooting your weapons. It is incredibly charming to the point where, if this were a fully polished game with these mechanics, I would pay to play it. The only thing that knocks this day a bit is the amount of bugs, but that's to be expected given the short development time.
The greatest compliment I can give is that I WANT MORE!!! (once it's polished up a bit bug wise but still)
Wishing you luck in the jam!