If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
This game simulates what it is like to have hypersensitive senses, the way people with autism do. Use W-A-S-D to move, and mouse to look around. There are no monsters, no score, no goals. Just experience what it would be like to be an autistic child at a playground.
WASD - To move.
Mouse - To look around.