http://www.kongregate.com/games/nerdook ... ng-catcher

Explore the World of Dreams through music! Features procedurally generated music, simple and intuitive controls and the special Nerdook touch!
Created for the Project Eden Music Game Contest.

It's an ok game, gets old after a while.
Here's a partially edited sol with all the levels completed, in case it gets badges.
I'll update it if it does, because I don't know what the badges might be..