W A S D to move, arrow keys to turn, E to aim, T to show map and R to hide map, and X and C to change weapons. With recent Scratch updates making this unplayable bc of my taped together spaghetti code, I'm not gonna bother with it because its gotten too hard. If someone wants to fix it they can, I might remaster it at some point.
Credits to @Lazrune for the original Doom project!