Serifs gone nuts! They are understandable and recognisable and at the very same time tense, manipulated and random! What makes it truly cool is that every letter has 5 different variations - and they immediately cycle as you type. That will make your text look rather random and more authentic (instead of undoubtedly duplicating letters!)
Reward Jerk also includes a matching Box version - a handdrawn background layer, made to make the letters stand more out!