Thank you for the feedback! I actually began on this before I found out about the game jam, and I originally intended to make basically everything unlockable, and have multiple teirs of customization. Of course, this was simplified for the game jam.
As far as everything else, yeah, I'll be the first to admit I'm not the greatest artist out there, haha. And the enemy stuff was intended, I tried to put thought into the enemy placement so it felt fair, challenging, and engaging.
All in all, thanks again for the feedback, and I'm glad you had some fun with it.