Super Mario Bros.: World 5-4

This level is the same design as World 2-4 but this time, all the blank squares are filled with fire bars. The one under the ? Block has a long fire bar twice as big than all others. When you reach the section with platforms moving up and down, fire will be incoming and a fire bar moves fast by 6 coins. Reach the drawbridge to battle Bowser again. Touch the axe to finish and Toad will explain that the princess is at another castle.