Make your way through tunnels and secret rooms to ultimately steal across the yard and over the wall. Sneak up behind guards to knock them out. But be careful, they'll hear you when you run. Avoid search lights by hiding in the shadows.
Arrow keys left/right = walk to the left or right
Shift + left/right arrow keys = run to the left or right
Arrow key up = reach up, pull yourself up
Arrow key down = crouch or climb down
Space bar = jump