Gosh, your games are so good. This one was particularly charming, and difficult in just the right way. Super cool mechanics. Clearly designed very intentionally with the player in mind. Awesome boss sequence at the end that ties everything together. Bravo. 10/10.
If I had one critique, it would just be that the hitboxes on the powerups feel small, especially with the glow around them. Sometimes I'd miss them, even when I thought I was accurate. Not a huge deal though.
Anyway, I've been a die-hard fan of yours ever since I played your tribute game "A Super Short Hike." It was fun noticing some small recycled assets from that game in this one ;)