Solid gameplay and cute music. There is some difference in sprite resolutions that is noticeable in pixelated games, but I can overlook that.
I also had the problem or jumping over the wall on the far right side and then jumping off into the void. I thought the game was incomplete until I read in the comments that there is a second boss. A way higher wall and an arrow sign past the treasure chest would solve that issue.
The enemies' hitboxes are way too big. It is not that difficult to avoid them, but it is a bit annoying getting hit from what looks like a safe distance.
Overall, it is pretty enjoyable, I wish it was a bit longer.