This game looks great and the mechanics work well! I also enjoyed the little bits of lore dotted around, I think that narrative approach works really well in this genre.
A couple of feedback points to make things even better~
- Pretty easy fix I think. When fighting the boss before unlocking the claws, the first time after beating the boss I walked off the platform to the left and fell out of the map / had to reset
- The screen transition works well, but I wish it was a little faster so I didn't have to wait for the camera to catch up to my player
Overall though, excellent work, especially for 30 days!