Roman Yankovsky has published a word game built with Delphi XE5 Firemonkey for Android to the Google Play store. The game is called WordLines and basically you make words out of letters in a line. He also used the TRESTClient component to create a high score table where users can post their top score from within the app. In addition to the game running on Android he also published it for Windows, OSX, and IOS using the same codebase (there are screen shots of it running on each platform). The best part about it is that he has provided the source code for the whole game for you to check out. The blog post is in Russian but I have provided the Google Translate link for it. I have also included a mirror of the source below in case the original goes down.
Source Mirror: Delphi XE5 Firemonkey Word Game