WASD to move, arrow keys to turn camera.
@griffpatch for the tutorial that taught me how to do this a while ago. The same general system is used in my "3D Room Test". While making this, I noticed that the red walls gave a horror game vibe, so I added the darkness on top, which kind of helps it look like you are shining a flashlight. As a reward for reading this far, here's a tip: Press K and L at the same time to get rid of the darkness.