If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The game Discman takes place in a mysterious world of future. Become a guy with a blue helmet, go to the mysterious interior consisting of convoluted corridors and in each level, try to get to the door, which will allow you to enter to the next level.
W,A,S,D - Arrow Keys - Move.
Mouse - Throw the disc.