Was really enjoying the game after getting through several levels.

Ended up getting a game-stopping bug, though:

This happened right after I'd tried to use the ability that has block with a coffin-shaped image on it.  I believe the card had been upgraded.

I also saw some weird behavior in the pathfinding.  I think one of the monsters tried to path through an orb and kinda got stuck against it, unable to move.  The orb was next to a wall, and the monster was above the orb with the wall on the left.

Anyway, nice game. Fun retro aesthetic.