you need to press ready (P key on the keyboard). In the upper left corner of the screen before the game starts there is a widget that shows the "player ready" status
That's how I got killed in the first place, by pressing P and then playing. The entity killed me, then I wound up in a new room, with two meters on the table. Do I just press P again in there? There's no prompt for anything. None of the doors open, there's no Press P in the corner.