Thanks a lot. I finally got to a point where I'm really satisfied with it, so hearing other people had fun with it as well is great.
Here's the (likely) actual final version of the level.
I didn't really change much, just removed the moon since it wasn't really too well hidden, and the jump back from its location was really risky as well (and right before the midway point, which made it even worse imo). Thanks to Hobz for suggesting it on IRC!
I've also edited the post in the submissions thread with the updated resources so I guess I'm finally done. Designing this level was a lot of fun, and regardless of how high I get I hope I at least get a cool-looking cutoff blargg OW sprite ;