Hello! I was one of the streamers who took part in Feedback Quest, and I'm here to leave some comments I had while playing.
To start, I love how colourful the game is. Everything is bright and pops out well, making it almost impossible to get lost. I also love how both enemies and the player are affected by a knockback when the player attacks an enemy. I don't usually see games do this.
I do feel the attack range is very small, though, given the size of the character. This is both in its horizontal distance from the PC, and the vertical area above and below the fist. I had many occasions where I would jump and attack an enemy and would see the fist clip or even outright hit the enemy only for it to not actually count as a hit. I also think there should be some invincibility frames after getting hurt. While this isn't as much of a problem with enemies, if you accidentally get caught in a burner fire you can die really fast. Finally in terms of my own comments, I'd like to see customizable controls. The default controls feel a little wonky to me.
I also want to note a bug I observed. If I died after collecting some coins, I would lose them upon respawn. This even happened if I saved. This wouldn't be a problem if the coins all returned, but most of the time they didn't and I would just lose the coins permanently.