I noticed two bugs:
- Sometimes after the level ends, you can't select upgrades. You can click them as many times as you want, but nothing happens.
- Sometimes when the level begins, it starts in slow-mo mode, and it carries on for quite a while, longer than you usually get when hitting an enemy with a bat.
Also when you go for an explosion-based build, it becomes hard to discern what the enemies are doing cause everything gets covered with explosions.
Other than that fun game, keep it up, looking forward to more content.