The Windows Phone 7 Marketplace has its fair share of jumper games where you have to jump your way up the phone's screen. DropDown takes you in the opposite direction.
In DropDown you guide a ball through an array of bricks, dropping it towards the bottom of the screen. Layers continuously move up the screen with holes you have to drop your ball through. If you get trapped at the top of the screen, your ball bursts and the game is over.
DropDown supports both touch screen and the Windows Phone accelerometer to move your ball about the screen. There are bonus items along the way that will pause the screen, destroy bricks and sets the ball on fire. Additionally, you have a limited number of bombs you can use to create holes to drop through.
DropDown is a free game and you can download it here (opens Zune) at the Marketplace.