You control Fireboy and Watergirl in Fireboy and Water Girl 4: the Crystal Temple. They're constructed of elements and have strengths and weaknesses that match. Fireboy can walk across fire and lava, but not water. Watergirl may easily navigate past water barriers. Like her fiery counterpart, she'll perish if she touches fire. Each level has two jewels. Fireboy collects red ones, while Watergirl collects blue ones. Try to finish each level without killing Fireboy and Watergirl. The crystal temple includes teleporting crystal mirrors. Watch Fireboy and Watergirl.