Superbly executed! Fits the jam really well and is super fun to play, art is crisp too! One thing I would maybe add is numbers under the available spaces for enemies just so you always see which number corresponds to which field. Right now when the board is somewhat empty, I found myself counting through invisible spaces to make sure I shoot the right monster. Just a tiny little polish thing I suppose.
Also screw the ranged tumor boys, holy crap! :D