Ghost is partly right about the sandbox because the sandbox is a lot of work, but what I'm saying is that the game, having a pred student that you manage, should be able to eat any student (be it a normal one or the main pred) if You have 0% hunger and after digesting them you can eat all the remaining students in order to win and/or investigate the rooms for X amount of time (it would be very little time, around 2 minutes 30 seconds or 3 minutes) to being able to find the book or escape without worrying about being eaten.