Android is a Linux. Linux is defined by the kernel because literally everything else is interchangeable although parts like the GNU stuff are fairly popular and almost always included. Linux already comes in dozens of distros that you'll sometimes even have trouble identifying as the same OS. It's perfectly legitimate to fork your own distro with whatever software you want. Hell, even the basic GUI comes in two major flavors (KDE and Gnome) plus dozens of minor ones. This runs on top of the X server which again is (or at least at times was) available in multiple implementations. Pretty much only the Kernel is developed as a single project and then there are all kinds of modules you can stick onto it to turn it e.g. into an RTOS. And then you can still see proprietary UIs and whatnot on Linux for embedded systems, many a router and set top box runs Linux. All that because reimplementing the core features of an operating system is a CRAPTON of work.
Since the Kindle can run the same software as other Android devices it's just a different distro, not a different OS. Amazon has an Android app store, actually making a new OS would make everything on that store useless to them.
Anyway, if you want to claim this to be the official thread:
What games are people here playing?
The ones among mine that I would recommend are:
- Dead Trigger
- Star Traders RPG
- Anything Kairosoft (although Game Dev Story is popular because of the subject the best of their games gameplay-wise are IMO Epic Astro Story and Kairobotica)
- Delver
- Dangerous
- Destroy Gunners II SP Operation Iceburn
- Triple Town