Course ID: F350-0000-0233-E1E6
Bookmark this level here: https://supermariomakerbookmark.ninte...

This is the third level I made. It utilizes a fairly nifty gimmick -- if you like rhythm games, that is. And if not, it's fairly easy to make your way through like a normal underwater level.

(Here's a challenge: if you know the trick, you can do the whole level with your eyes closed -- and yes, I've tried it!)