The screen flickers with bright colors. Mario jumps high, trying to avoid the Goombas. He lands on blocks that make him grow big. The koopa shells roll slowly, then slip and slide when he kicks them. Luigi walks behind, watching carefully. They run into a pipe and fall down. Luigi gets stuck, and Mario has to push from above. Finally, they reach a door with stars. Mario picks one up, and his body changes shape. He stomps on enemies now. The level ends with a question mark block. Mario jumps again, but this time it’s empty. They both walk out, ready for the next challenge.