Played it full-window in a browser, one run, didn't reach the exit. You're right that the pulse is the whole game. First moment it felt unfair: my second pulse, not my first. First one I was just glad to see anything. Second one I already knew it heard me, and I pressed it anyway because I still couldn't tell if that glow was the exit or a wall seam. So I paid for an answer the room had already made me want. That's good-unfair. The drone rising is what made me move without deciding to. Would play again.