Mushroom Universe X

(This is from when I was a noob, and did not know how to use SMB3 letters properly.)

I'll be somewhat surprised if anyone remembers this. It's an episode I started a long time ago and never finished. I've decided to clean up all the levels and actually post it. While this is fairly old, I'd still like some feedback on it, so I know what to improve in future levels.

Screenshots (I'm not good at taking screenshots):

Download (mild swearing warning):
https://drive.google.com/file/d/0B3jEIkDJ5qLeNkNpUzhTTWF2UEk/view?usp=sharing
Just click the download button at the top.