Everything about this game is great. It's one of the best in the jam. I usually like to give constructive feedback but there's really not much I can say. One little nice to have would be if you color coded the buttons to match the towers, it would really make things a little more intuitive. I'm a little slow, and I frequently clicked the wrong one.
Other than that, the only problem with this game is the FREAKISHLY LARGE MUTANT LEAVES! Where are the trees that dropped these things? They must be HUGE!