I really enjoyed the game, huge recommend to anyone.
Some feedbacky notes:
* game lags to unplayable when closing off with walls (gnome magic?)
* not sure how I like being stuck in sow/etc animations, kinda wanna hold button while doing something
* exiting from build tool only possible with escape (which exits full screen) or changing to gun
* UI didn't update cost for spire
* bullets hit walls a bit too easily