In my first map, "The Odd Mob Out", you have the objective to decide which mob/entity doesn't belong with the others.
This map was made for Snapshot 19w11a (Minecraft 1.14).
My first map, "The odd mob out", is a simple map (for any snapshot/(pre)-release of 1.14) where you decide which entity (not just mobs with AI) doesn't belong with the others.
Simply choose by pressing the button in front of the mob that you think doesn't belong.