Over on my D&D website I'm featuring the work of post-apocalyptic artist Yanobe Kenji. Whilst his work is not Superflat it draws on a lot of the same cultural influences and projects it into a dystopian future.
D&D (or Dungeons & Dragons to use its full name) is a roleplaying game based around fantasy worlds. However there are many other role-playing games and some of those focus on a post-apocalypse earth. Yanobe Kenji's work picks up on the same worries, concerns and fascination many of us have with a world were our civilisation has come crashing down.
Works like Foot Soldier above draw on the cultural images of monsters. The influence of Godzilla and similar creatures is clear, though it could be a Pokemon. His Lucky Dragon work seen below draws on a similar monstrous theme though this time the dragon, a mythical creature. I'm not sure where the idea of a dragon came from originally but the idea of a fire breathing wyrm is seen in many culture across the globle and kept alive in films and games like D&D.
In common with many Superflat artists, Kenji uses and recycles classic western imagery. In particular Mickey Mouse. Works such as Nest for Dictators and M the Knight flaunt this connection. However it is in less obvious work where is creativity really shines.