[Recommendation Request] Favorite Games on the Amazon App Store?

So I've got about 2000 coins on the Amazon App store right now from the free Camera Apps & GTA:San Andreas deal a week or so ago.

Just looking for some recommendations for games, so what are your favorites that are available on the App Store? I guess I'm partial to tycoon/strategy, platformers and physics games on my phone, but really anything will do.

Semi-related question: Any idea why San Andreas is compatible with my phone on the Play store but not on Amazon?