I really like the idea of a tower defense game whenre YOU ARE THE TOWER, but there are some problems that hold it back, besides the bugs that were mainlyl due to the time constraints.
First, some more UI elements would have been nice, to know at least what weapon I'm currently holding and how long the cooldown is. As it is a relatively fast paced game (and the first round is already quite tough), I want to have this info available and not need to memorize what was teh last weapon I had when I scrolled down or just spam M1 cuz I can't see if my weapon/ability has charged yet or not.
Second, The visuals, in that what you have is great with the environment and props, but not having em on the player and enemies does hurt the experience (as others have said, the problem would be mainly how you set your priorities) At least changing the color or the shape of the enemies would have been enough to help distinguish em better.
I do like the different types of attacks and their unique effects tho! And how tense it can get on your last stand defending that cart.