A fantasy action RPG set inside a procedurally generated magic castle. Four character classes are available — Knight, Magician, Archer, and Fighter — each with distinct combat styles and ranges. Fight through traps and monsters, collect items including potions, weapons, armor, and scrolls, and grow powerful enough to reach the illusionary treasure at the castle's heart. Up to four players can adventure simultaneously and trade items between characters. Music shifts dynamically based on the situation.