Actually, I was surprised by how often I had to replay levels to try and figure out the most optimized score. It's clear you put some thought into the level design. I thought it was funny how you could get a score beyond 100%. I would suggest you make the player sprite different somehow, either through color or design, because I would often start a level unsure of which one was me. The other suggestion I have was more personal. I found the music became grating to my ears after a bit. While I think the chiptune type is a decent fit for your vibe, when I'm thinking I don't want something that's difficult to tune out. Peaceful and subtle aren't often easy to find in chiptune music though. Overall, I enjoyed playing this game. Nicely done