Very fun! It took me a few minutes to notice the potion descriptions so maybe try and make those more visible. Around 3 minutes into both runs I saw lots of weird dark spots. I'm there seemed to be some light glitches where they wouldn't shadow the tiles next to them if they were supposed to. I'm not sure what happened, but it caused me to die quickly. If that's an intentional monster effect, possibly adding an outline around the monster in the shadows that's causing it would allow the user to still attack them.
Over all very fun!