The design of the level was intended to allow the player to essentially hold forward and be able to find their way through the level. It's hard to tell with the very simple paper map but many of the early rooms have multiple ways into them. Early on before you get the first keycard most combat arena's have multiple doors you can enter from that allow you to take different ways into them so the player doesn't hit dead ends early on and instead are always finding the next correct room to go to as long as they go to a door they haven't been in yet.

    This I felt kept the pace smooth and consistent while also creating some interesting scenarios for the player to deal with. In particular the circular combat arena on the third image on the west side played out very differently depending on which end you came in. As on one end you would come in at the top of the arena and have to scavenge for ammo in the room but be in a safe position while coming in the other you'd have plenty of ammo and health as there's a restock area just before but you'd be walking straight into an ambush. Taking either way also made sure you learned both important aspects of the level in pieces rather than all at once. One being you need a red key, and the other being where the red key is and how to get it.