We decided to create something funny or unusual, and the idea for "Only One" that we came up with was "one shoe" and object throwing game mechanic. What I meant by one shoe is that the main goal of the game is to find a shoe which was lost while wandering inside of an abandoned building. The object throwing mechanic fit the theme quite nicely as well, because the player is able to damage an enemy only once with one object.
Check out the game if you're interested!
https://itch.io/jam/gmtk-2019/rate/463156