Super Mario Bros.: World 4-4

This level contains a puzzle in which you must take a specific path. If you take the right path, you'll advance to the next path. If you take the wrong path, you'll start from the beginning. First, take the upper path but avoid the fire bars. Next, go through the openings and take the lower path by fire bars. Once you guessed both paths right, you'll see fire incoming. You'll meet Bowser at the drawbridge again and hit the axe to finish, only to hear Toad explain that the princess is at another castle.