Good level. Something I noticed though: your "letterboxing" in this level is a bit uneven, since there is more black space at the bottom than at the top. I would suggest making it even, or if you can't do that, make it reversed so the top part takes up more space. The reason is because it's more important to see what's below you than what's above you.

Also, are there even 100 coins in the whole level? I didn't find all the secrets, but it seems like there aren't nearly that many coins.