I've tried your game until level 3 and opened 1 chest. I saw the 2nd chest but could not find 2nd key after roaming around the maze so I stopped. Although I might not be your targeted audience, I still noted a couple of observations below, which I hope could be helpful:
- as I moved and pushed the camera, the view jumped exactly 1 tile in that direction. Although I know you are trying to keep the feel of old games, visually it made me slightly dizzied after a while
- feel redundant to have HP/XP numbers and green/blue bars at 2 different places, showing the same info
- could not tell the difference between the enemy types (white eyes and yellow eyes). I guess later enemies are simply stronger, but couldn't feel the difference by looking at hp bar drops
- once I found the 1st chest, as I was finding my way to it sometimes the chest just disappeared and later reappeared. Not sure if this is intended behavior.
- When I get my first key, I noticed its icon at bottom right. That's when I saw the sickle icons which I assume to be attacks but couldn't find a way to use it
Hope you could also give my game a try and share your feedback :) It's a re-imagining of the classic Tetris blocks as part of a turn-based combat system. Jam page