It is somehow similar to the old Macintosh video game diamond.
In the game you control a jelly fish that always bounce up and down. By tilting the phone you can make it go left and right.
The goal of the game is to free all your friend trapped into bricks. You can break the bricks that are of the same color as you only, and some special bricks make you change your own color.
I write this game using Qt, it is already available on ovi store and it is totally free.