ok, so this was definitely the best LD game I played this time around (so far, and I've played a few). Other than the game being well made and polished and all that, it also had me playing for a long time. Partly because main mechanic was fun and felt good, partly because I kept discovering new intricacies in the gameplay, but I think the most important thing was that it was very hard to lose. I tend to stop playing games when I lose a couple of times, but having the Sonic-esque health, where you just have to wear a hat to survive, worked really well in keeping me playing for a long time. Really awesome. Another cool thing was that I felt I got better with time. A jam game where I feel like I'm making meaningful progression of skill is super rare in my experience.
Didn't like the floaty air controls though. Only complaint.