The Abyss

Sometimes it's better to hide in the dark, but don't forget to give your eyes time to adjust before you go wandering. Can you find all 5 keys before it finds you? WASD to move F to toggle flashlight ESC to pause.
You wake up in a dark, damp tunnel, lit only by a flashlight discarded nearby, with no memory of how you got here. The only exit is locked with 5 locks and you're sure there's something down here with you.