Quite fun, dig the art style, too bad there were no sound effects.
Some enemy placements were a bit annoying, sometimes I'd go into a room, and a goblin would immediately take a chunk of my health.
I'm glad you implemented checkpoints, but I wish I'd respawned with more dice rather than just one, it makes it harder to challenge a difficult room.
Also, the powerups could be more obvious and more interesting. It is difficult to look to the side when there is a lot of action going on. If you ever decide to expand upon the concept, more interesting abilities could be added, rather than just stat modifiers.
Overall, great job on your game!