I can tell a lot of thought went into making this. Is it going to get expanded? Here's my thoughts.
First, the spider with the healing ability. I liked that it could heal giving the player a challenge to overcome, but there's no way for player to heal other than at checkpoints. Maybe either making a heal ability, or a potion of some kind for when health runs low in battle could be beneficial. Maybe spacing the checkpoints closer, or if you have to keep it that way due to the map, add more checkpoints in.
Second, loved all the boss fights they were all challenging and cool in their own way.
Third, the music, art, and combat were absolutely amazing and very well done those time events for those attacks were really cool (except the flea that little guy was annoying lol).
For a short game the story was good, but id love to see this expanded. Had alot of fun playtesting this, and would play it again and recommend to others as well. Great way of iterating something old, to make it new again! congrats on such a great job team! Here is my video playthroughs.