I need the name of an old computer game!!! You bounce around on blocks in the sky to change their colors?

I have no idea what game this is. I used to play it a lot. It's a computer game in which the main character (some pink thing, I think) had to bounce around on blocks to change their color. There were some annoying little bad guys in it that you had to avoid running into, like evil storm clouds, etc. It took place in the sky. You were supposed to be defending something (maybe)... Please help!I need the name of an old computer game!!! You bounce around on blocks in the sky to change their colors?
I do not know and yet I 've already heard but I can think of.

hello I am Italian.