I like the core idea here. I think there's a lot of depth for puzzles.
I struggled to figure out the rules of the game (like what blobs take damage from which spells). It took me a while to figure out that I took damage if my spell hit a wall. I also stumbled onto shooting a potion causing the blobs to change colors. I think some puzzles designed to teach rules would really help onboarding new players.
The art was nice. Standard dungeon pixel art, but very much did the job.