Holy shit. I recognize you can't do anything that isn't so well made.
Hats off to the submaps as their structure are some of the most beautiful I've ever seen, hands down.
The bosses give me a Brutal Mario vibe, though I haven't seen many koopalings used this creatively. Wendy is a cool one and I like how her attacks are more concentrated and she uses pipes (faithful to how SMW did it).
Your music... are you sure you're new? I have no comments to describe the eyecandy they are.
Props to you and your hard work, man!