Karls Kavern is a single-player action, casual, arcade, and platformer game in which players navigate through thirty single-screen levels, collecting scattered boxes while avoiding dangers. In this game, the setting is an underground cavern where players must jump between platforms, including moving ones, to complete each level's objective of collecting all boxes. It stands out with its challenging gameplay that involves avoiding hazards, collapsing platforms, and conveyor belts, requiring precise timing and strategic movement to survive.