It's not very often a person can get to talk about evolution particularly in the sense of a game. Some games do evolve in terms of the original and the second incarnation of the title; however, this is exactly what Spore Creatures manages to do.
This game picks up directly after where Spore Origins had finished, and, as you might have expected, this game's an improvement, if not slightly different. Gone are the battles between your creature and other players' which had been a little problematic for the original version of the game (particularly when you can't find someone else with the game on their device). Instead, you will become immersed in a more RPG style game adventure.