I did an app a few months ago that was not published in the Apple Watch App Store since there were already a couple of 2048 clones and thus Apple didn't accepted it to prevent SPAM.

I did this Game using Swift, XCode+AppCode and SpriteKit. At least it served as an experiment to learn how to use SpriteKit, animations and transitions.

I added a few debug-mode options to restore several games to easily test when the game has been finished.