I created a game last night which requires a lot of typing, really putting your typing skills to the test.
The game is created using the Unity game engine. It looks like a lot of effort went into the design and effects, but it really just takes advantage of sneaky post-processing tricks on the camera.
The game is a web-based game, so you're free to play it within your browser. I would love to port this to Android, but I'd have to plan the mechanics and change how you shoot since you really can't do a lot of typing on mobile devices.