The Forest Temple

In this action puzzle game, which is the first in the Fireboy and Watergirl series, the titular Fireboy and Watergirl explore the Forest Temple in search of diamonds. There are 32 single-screen levels in which the players need to activate buttons, move platforms and jump over lava and water pits to reach the exit. Fireboy can safely walk over lava and collects red gems, while Watergirl is safe in water pits and collects blue gems. Green goo hurts them both. The game was designed for two players cooperative play using a single keyboard (on PC), but it is possible to play the game alone switching between the characters to solve the levels' puzzles.