This is a lame way to break it down, but to me it feels like a game that should've been $10 if only because other $15 games have been so good.
Depending on how you feel about parodies and references, you may end up liking it less or more. It's all really dense and self-aware but that's the entire game. It's a game of references, not a game with references (like Matt Hazard, or Conker, or Simpsons Hit and Run, or something). The actual game part is mostly a straight take on old 2D GTA games. oh, and the filters and stuff look authentic. It's fun.