Fireboy And Watergirl is designed to be played by two players working together, either on the same keyboard or in solo mode by controlling both characters. Each level is carefully crafted to require collaboration, timing, and coordination. Players must solve puzzles, avoid hazards, and activate switches to progress.

There are several versions of the game, each with a unique theme—like the Forest Temple, Ice Temple, Crystal Temple, and more—which keeps gameplay fresh and exciting.