Do you believe you have quick reflexes and instant reaction? Prove it. Introducing ReactTime, by Sandak. This little game will test your reaction times by stopping cars as soon as they appear on screen before they crash into the vehicles on the right hand side. Your average reaction time will be displayed throughout with highscores being recorded.
While it's simple and doesn't have a thousand achievements to aim for, ReactTime will see you test your reactions and boast to your friends should you be faster.
You can download ReactTime from the Marketplace for absolutely nothing.