Sepp is a version of the classic sliding puzzle
game in which the properly ordered tiles form a
picture. The picture is user-selectable, as is the
tile-grid geometry. Additionally, Sepp implements
an innovative kind of player aggravation: based on
a user-configurable degree of evil, it decides,
during each animation frame, whether it will
disturb a tile while the game is in progress. Sepp
is written for the DrScheme enviroment, which is
available for all major platforms.