Good! Some of the best tile art I've seen in a PICO-8 game. Takes a little bit to become fun instead of frustrating, but the good parts are really strong. You're good at introducing new obstacles and using them in creative ways (I got as far as the blue note blocks)- it takes a while to get past a new room, but it feels like every time I do there's something new to play with.
There's a few rooms that have water at the bottom, and I found it rewarding when I was able to react quickly and swim instead of falling down another screen. I wish there were more opportunities to save myself from falling like that.