I spent some time myself trying to think of a solution for people falling into that playstyle, but nothing came to mind. The Watchtower note explicitly warns you the monster gets stronger, so it's not like the game doesn't give an early headsup. Also the game is short and the navigation focus means restarting is pretty painless, you can just beeline through the previous objectives and set your second run up for success. So all in all I came to the same conclusion as you ^_^