Collect all the diamonds and reach the exits! Tap on the character you want to play as. Tap on the on-screen arrows to move. When running, the arrow for the other direction will become a jump button. This new world contains portals that will teleport either character when they walk into it! Portals have both black and white lights, which will lead to two different teleportation points. If you enter a white portal, you'll exit out of a white portal and the same is true for black portals. So make sure you know which one you're going into and where you'll come out!

Some portals may require a switch to be flipped to become active.

Since fire and water don't mix, be sure to not let Fireboy go in the water lakes and don't let Watergirl go in the fire lakes... And keep them both out of the black lakes.

Some levels may require a light to be shone on a sensor to activate a platform. You can push a lever matching the color of the light beam to rotate it or push against a slider to direct the light to a sensor.

Push levers and press buttons to move floating platforms. Stay on buttons to activate the platform, then move off to return them to their normal position.

Some levels contain ice. Fireboy slides fast on the ice, but Watergirl will move really slow on ice. Neither are able to jump on the ice. You can freeze water with blue lights to turn into ice and melt with red lights to get water.