You have 100 clock ticks to get through this level, and the only way to even get the Warp Box to the Goal Pole zone to appear is to eliminate the Goomba Towers and the Fire Bros. commanders. Save these towers for last, bringing a Cannon Box to take them down, or ideally a Lucky Cat Power-Up! The Goomba Towers that must go are all out in the water: three start in front of you, and one of the tower is next to Green Star #1.
In the interest of speed and convenience, it is arguably faster to collect the Green Stars out of order.
Green Star #3
Go after this star once you’ve taken out the first three towers of enemies. On the far right side of the beach you can find a sleeping Goomba Tower with a Green Star on top of them. We recommend this star first because it places you near ? Blocks that contain a Fire Flower, Lucky Bell, and Boomerang Flower, all of which can be useful here.
Green Star #2
Not far from your starting position is a Clear Pipe that you can use to launch up to an invisible cloud platform and another Green Star.
Green Star #1
Near one of the Goomba Towers is a small pier with four unlit torches. You can either trick the Fire Bro on the Goomba Tower into lighting the torches, or you can light the torches yourself with your own Fire Flower. Either way, you get the Green Star. Make sure to eliminate Fire Bro in this tower quickly. If you took out the other three Goomba Towers at the level start, this will trigger the Warp Box to appear.
The Warp Box appears out in the water, almost directly in front of the level start. You’re probably very low on time at this point, so don’t mess around with side routes. Dash to the Warp Box, then rush for the Goal Pole.