Spirit of Fire & Water is a Mobile 2d puzzle-action game where players control a spirit that transforms between Fire and Water, each with unique abilities. Fire can kill grass enemies and burn wooden barriers, while Water can kill fire enemies and traverse underwater areas. All enemies are attracted to the player regardless of their form, adding constant tension. Players must find keys to unlock pathways, solve puzzles using their dual abilities, and ultimately collect a star to complete each level. The game emphasizes strategic transformation, exploration, and the harmony of opposing forces to overcome challenges.