A Simple Gaming App For Android

I want to have a small and simple game created for the Android platform. Here are some details of the game: - Before the game starts user will be shown an object (one out of five objects) that he has to hit. - When the game starts, the user will see an object in the screen. - He has to hit the object by touching the screen on that spot, but only if it is the object in step 1. - Plus 1 score for hitting the right object and minus 1 score for the wrong one. - Game would last for 1 minute. These are the high-level requirements. Exact details would be provided to the service provider. It is not critical, but having previous experience in building Android apps would be lovely.