If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
You wake up in your room on a quite night only to find dark creatures are roaming the earth. They seem to be sucking the noise out of the world. Defeat them by playing the trumpet of the Gods.
ASD to Move.
Space bar to Jump.
W to Walk through Doors
Play Your Instrument with HJKL or Arrow Keys.