Well, C3 is almost ending but I promissed to myself to comment about this hack; one that I finished playing.
I really enjoyed this much man. Your level design is pretty great, gave me a feel of SMB3 and DKC in certain parts. But as you said in the last message, I'll report some things I found (I just realised they're out of order):
Press enter again.
Bad corner tiles there.
Seems like you forgot to place the sprite that fixes these issues here.
Just being sure you know this.
It's wierd: when I enter on midway I cannot get this. Also, don't place them in map16 (don't place anything in map16 actually, it would be better).
Mario's way too close to the corner. I consider this bad, but depends on your oppinion fix it or not.
I guess it's just me, but was kinda hard to recognise BG and FG on the start of this part.
Well, I'm trapped because I broke all the blocks. Damn me!
Priority sometimes isn't a good idea.
There's no reason at all to enable sprite buoyancy on this level. If you disable that, you'll get rid of this "splash" when exit a pipe with something.
My block stock is over! Duh!
I'm pretty sure there's a patch that allows you to use bigger level names
Well, that's everything I found, no enough time to write anything else
I hope it was helpful.