This platform game has Fireboy and Watergirl progressively making their way through a temple. Each level in this Fireboy and Watergirl game requires both characters to collect diamonds as fast as they can in order to unlock the exit. Obstacles and platforms serve as the only hindrances between Fireboy, Watergirl and the exits.
The game is divided into three categories. One category requires you to reach the exit as fast as possible while grabbing all of the diamonds. The second category is similar to the first, but needs you to move both Fireboy and Watergirl simultaneously. The goal of the third category is to collect the green diamond and reach the exit.
Watergirl cannot pass through fire and fireboy cannot pass through water, while green mud can kill both characters. If either is killed, the level is lost. Different obstacles, levers and buttons are in place throughout each level. At the end of each level, ranks are given according to the time they take to complete the level.
A, W and D are used to control Watergirl, while the arrow keys are used to control Fireboy. Both characters (watergirl and fireboy) must be guided to their exits in order to progress to the next level. All the diamonds must be collected in order to unlock the exits (Fireboy can only collect red diamonds and Watergirl can only collect blue).