ABSOLUTELY FANTASTIC, I'm in love. Your vibe in this game is immaculate, the art is beautiful. I really love the concept too, I'm not a huge platformer person and I'd totally play this. The opening cutscene is really cool too and has me hooked.
I loved the music and sound too, but I had to go in and turn it on. You may have exported with all the audio off. (I would have done this, hearing the same tune over and over drives me nuts)
I'm on Windows 11. I noticed the game ran under my task bar, not sure why. It's probably something cooked with Godot's full screen settings. I couldn't read the controls at the bottom of the screen because of this. (It looks like E makes the ball sparkle but I'm not sure what that does.)
I felt like getting the green and red markers to come up was a little inconsistent, and the speed the platforms came up was inconsistent as well. I can speed run the first row of platforms but I can't take the first turn at full tilt. If you can fine tune that this would be a rad game for speed running and streaming.
I'm real curious what the books do, I couldn't work it out. I tried using one as a ramp, but I didn't have the skills.