Type: Rider. A platform game produced by the European channel Arte. You control two dots who travel across the history of typography. Each time you pass a level, you unlock informative text segments that can be read at anytime (5 languages supported). The graphics and the music are beautiful, this is fun to play and the history of some popular fonts is surprisingly interesting (I finished four chapters so far).
Actually a part of the main Humble Bundle (until April 15), pay what you want for a bundle of some games compatibles with Android, PC, Mac, Linus.