From the back of the book:
The GeRPSy is a universal engine to power your role-playing game. It is suited for the genres of fantasy, sword and sorcery, science fiction, super hero, western, pirates and anything else you can imagine.
Its flexible and light rules allow quick adaption to any genre and background while preserving character depth and role-play.
Combining descriptive and stat-based character creation with a core mechanic running on only three six-sided dice, the GeRPSy is suited for beginners and veterans alike.