The art was great! Everything looked good and the animations flowed smoothly. The only issue with animations was the player's attack didn't line up the animation it played, but otherwise was excellent. The gameplay itself was also very fun, but only after you get your first powerup (in the furnace). Until you find your first powerup, you kind of wander around aimlessly. If I hadn't played a metroidvania before, I wouldn't have known to look for new abilities in the first place. A linear section at the start leading players to their first powerup would help newer players know what to look for. The enemies were fun and a good obstacle, but combat was pretty finicky with the hitbox issues, so I avoided combat when possible. A small thing too was in the bottom right of the furnace and a few other places you can see outside the map, but that's a total nitpick. I really liked the wall jump section where you have to climb out of the pit, that was creative! I ended up getting all 20/20 of the trophies (although I thought they were coins at the time), and the game overall was extremely fun!
Also I didn't realize until just now (by reading another person's comment), that the pressure system was designed to kill you. I never interacted with the mechanic. I guess I prefer it to the timer being too fast, but the timer was so long I didn't even notice it.

