There are two very tall towers that you’ll be climbing in this level. Climb up the steps at the beginning and ride the lift up and around to a Super Bell in the ? Block . Ride this next lift up then jump off around the left side so you can move around this platform to Green Star #1 . With the Cat Suit, climb up from here to a Cloud Platform where the Stamp is located.
Continue to climb up to the top of the tower and you’ll encounter three Magikoopa. Defeat them to reveal Green Star #2 then ride the gondola to the Checkpoint Flag and the second tower.
You need to get all 5 Key Coins to unlock the Warp Box and you’ll want to get them in order. Start climbing past the first enemy, using the Jump Panel to grab Key Coin #1 . Continue around the corner defeating more enemies to find Key Coin #2 and then Key Coin #3 up the Jump Panel. Climb the ramp here and break the blocks at the lower part of the wall. Slide under them to the right to find Green Star #3 then climb up to Key Coin #4 . Use the last Jump Panel to reach the top then loop around Key Coin #5 grabbing as you run back down the tower.
You’re doing this because Fuzzies will start to rush from the top down to crush you and this gets you a head start. Slide down the ramps when possible and reach the Warp Box quickly where you’ll be able to find the Goal Pole.