This is the free demo. One floor of the nine, generated fresh every time, with a monster on it and a night that runs out. The full game is a tower: nine floors, one fifteen-minute night, and an ending you have to reach before dawn.
Contains sudden loud sounds and sharp changes from dark to bright.
This same page plays in a mobile browser, held either way — the game lays itself out for the screen it finds.
Add it to your home screen and it opens like an app, with no browser around it.
Nine floors, the endings, and what is at the top of the tower.