Dual Tunnel is a game, but also a tool to measure your concentration and multi-tasking abilities. The game proposes you to drive two ships through two winding roads, simultaneously.
There are two modes, Accuracy and Endurance. In Accuracy mode, your accuracy is measured over two minutes of driving. In Endurance mode, you can drive the ships for as long as they survive; every time you crash one into a wall, it gets damaged.