I'm almost done with my second application for the Droid. The object of the game is to control cars moving through an intersection by touching on them to make them stop. Then touch on them again to continue driving. You score a point for every car that makes it through the intersection. Emergency vehicles (ambulances, etc...) cannot be stopped - to make the game a little more difficult. Every time vehicles crash in the intersection, the number of accidents increases. I'm still trying to decide what will cause the end of the game (# of max. accidents exceeded, time limit, etc...).
I've decided to put this game on the market for free and use AdSense from Google. I'm just waiting for the approval.