Here is a recent little experiment of mine:
As you can tell, no gameplay has been added yet, just the core mechanics. Got a few ideas of what to do, so will update this thread! Anyway, give it a go, and give any feedback.
HERE!
Hey muzz, I really like the concept, Just an idea…
Would you maybe like to collab? I can create all 2d/3d assets and maybe we could collab to produce it for IOS? 
If not good luck with this project looks like it could be great fun!
-Charlie
I’d love that, Charlie! Got you on Skype, so talk more there.
CharlieSamways 
Ill be on soon!
Im on skype now if you want to chat
not a cool move of him taking your whole idea
http://forum.unity3d.com/threads/93018-Drop.-My-new-Music-based-puzzle-game!
Check the other thread for an explanation.
http://www.youtube.com/watch?v=vmyLuIYGT9o
Nothing is ever truly original if you really take a hard look. We always build on something;-)