It's uhhh... not great. The controls are accessible once you figure out how to open your inventory to view the controls. Not a big deal though.

There's a completely untextured area leading to 939. I'm not really sure why SCP staff are leaving important documents on a park bench either.

SCP 939 patrols a tiny area with almost no fear of dying to him, which means that the entire start to the game is a walking simulator.

There is absolutely no danger of getting back to the car with the keys either.