libGDX is a Java game engine that's relatively simple and lets you deploy to HTML5, Android, iOS, and desktop. PlayN.io is fairly similar I think, but I haven't

libGDX is a Java game engine that's relatively simple and lets you deploy to HTML5, Android, iOS, and desktop. PlayN.io is fairly similar I think, but I haven't used it. 2048 is actually somewhat of an odd case, since it was originally only an HTML5 game that was built to run in both the browsers of desktop and those of mobile devices. For this reason, the developer didn't actually port the game to Android/iOS until much later. Pretty much all the versions on the App Store/Google Play Store were 3rd party clones of the original, since it was relatively simple and open source.