Game for strengthening your reflexes.
The rules are really simple. Tap on the red block and evade touching the blue blocks and the black border. Survive for as long as possible.
Every time you achieve your personal best time, this time is send to the server, completely anonymously (beside using a random string for your identification the first time you do so). You can see the global best score and your rank, which should drive you to strengthen your reflexes and focus even further!
The user interface is really simple, no apps and other distractions whatsoever!