I think there should be cheats for the people wanting to check out the animations, trying to find a place, or wanting to see what is ate the end of the game. I also think there will be a button that goes to the debug room in the spawn locations menu.
Some of the cheats I recommend are:
-Full health
-Full clothes
-Reset [the] room (For when you might get stuck or used ammo unwisely)
-Reset [the] room with full resources
-[Go to] Cheat Room
Which brings me to my next suggestion, the Cheat Room! The cheat room will give you other, more special cheats like
-Full gallery
or
-Reset gallery
-Unlock gun[s]
And also adding upon that, I suggest a better gun later in the game (if you decide to expand upon it). Like a machine gun, or better yet, a shotgun!