Good game quite polished!
Enemies have good telegraphing, I like the animations (like the head jiggle as they walk). Cool Doom-style story.
Found the player's head bobbing uncomfortable. Mouse is kind of unresponsive ( not sure if because it's web build) Checkpoints would be nice especially after arenas as those are the most annoying parts to play through after you die. I fee; like the sword attack sound effect doesn't fit the rest of the game's audio; it's kind of chiptune where everything else is realistic.
I like how the bosses heads fall off to indicate progress.
Excellent use of the tiles, nice color scheme and asset placement.
Enemies need some kind of sound effect when they spawn or are about to attack, sometimes they would spawn behind me and get free hits in because I didn't know they were there.
Mages seem to be impossible to kill with melee without taking hits; maybe longer pause time between attacks would be good?
Good game wish there was more!