Subway Surfers is an endless running game so you run as far as possible so you won't get caught by the police.
You take on the part of a little boy who can jump, dodge, and run away from an angry police officer. Obstacles to your progress include things like a speeding train, a train that appears out of nowhere, and horizontal bars that seem to be powerless to hold you back but reveal surprises.
Left/right arrow - Move left/right
Up arrow - Jump
Down arrow - Roll
Space - Activate hoverboard