Review of tricky place:
Graphics
An interesting mix of several graphical styles! There are SMB2 shy guys in a SMW level, but for some reason it works quite well!

The SMB2 Birdo seemed a little bit out of place, but I can understand why you included it since it's a pretty tricky boss. The SMB3 Bowser kind of clashed, but it made the level tricky so I won't judge it too harshly.
7/10
Gameplay
This is a very tricky level! xD I'm not a very skilled player, so I didn't know how to perform all these glitches at first. Your video was helpful, though, and it felt really cool to beat this level myself.
I really like the trick you have to do to kill the Mega Mole after the Birdo fight. The section where you have to ride on the blue ice block is also really creative, and I haven't seen something like than in an SMBX level before! xD
This level was a little tricky though, and I don't know how I would be able to beat it without watching your video. I think there should be message blocks teaching the player how to perform some of these obscure glitches OwO so it's not completely perfect.
8/10
Fun Factor
This level is very fun once you know how to perform the tricks! There are a lot of glitches to try out in this level, I wouldn't be surprised if every glitch is in this level! It's also fun to try and speed run this level, since it relies on mechanical skill so much

9/10
Overall, this is a very cool level with lots of tricks. It looks pretty good and it's fun to try and master. My final rating is
9/10