Here is a tutorial created by Samsung Developers, and gets you going with developing apps for a Tizen 2.3 Smartphone, the Samsung Z1. This device opens up avenues of further revenue streams for Devs.
The Tutorial talks you through the Memory Game, which is a simple native memory game. You get to learn the basics; the UI elements, screen transitions, and popups. Watch the walkthrough and see how we put those altogether. Full source code is also available from Samsung Developers.