Nice! I was looking forward to trying out some user levels, and you didn't disappoint!
1. "My Level" -- I really liked how simple this was. And I had been trying to figure out how to incorporate a level like this into my game, in fact. (Different, though similar idea of carving your way through the crates to get higher up. Great minds, great minds.) Though, I was having a dickens of a time doing it in this level - since the controls didn't feel tight enough to do what you needed to do. Very small spaces, very small margins for error. Do you notice the same thing when you try it? It makes me think that I'd really like to tighten the hit-box for burning the crates, too. It seems you burn ones even when you really aren't touching them.
2. "Hardcore Stars" -- ouch! Died a lot
3."Truexfret Danmaku" -- that one was fun. I liked it!
4. "Entrance to the Castle" -- I ran into some glitches with this one, not sure if you do, too. Once I activate the red switch, something really strange happens. It's as if I'm standing in a field of invisible boxes. Does that happen for you, too?