World 6-Tower (New Super Mario Bros.)
From the Super Mario Wiki, the Mario encyclopedia
In this level, the Skewers return. Mario must jump before the Skewer can damage him. After the midway point, Mario must quickly jump up to avoid the Skewers below him. After the door is another area similar to the previous one. Mario should get to the top before getting the second Star Coin. Through the double doors at the top of the tower is another Bowser Jr. battle. This time, Mario is able to jump on Bowser Jr. This fight takes place on a tilting platform.