They say most buildings don't have a 13th floor but you won't know for sure until you dash and dodge your way through these hazardous halls. Beware the crushing collapse and deadly ascent of 6 out of control elevators in a timed race to the top.
Use the left and right arrow keys or the A and D keys to start running. You can't stop running unless you bump into an elevator, or reach the ladder. But you can turn back to avoid a collision.
Use P to pause, S to toggle the sound, and escape to end the game.