Green Star #1
This level wastes no time providing you a chance at a Green Star. When collecting Green Coins after running through the Green Star Ring, watch out for the Octoomba and the spiked roller. The Ty-foo will be trying to blow you off the deck of the ship.
The bow of the ship has a hidden ? Block with a 1-Up inside it.
After using the Warp Box to reach the second ship, run to the ? Blocks to pick up a Mega Mushroom, then use your ground pounds to wipe out the nearby Ty-foos. You can then kick the Bullies and Octoombas off the ship with ease.
Green Star #2
To the right of the Warp Box at the stern of the second ship is a narrow walkway guarded by an Octoomba. Work your way past it and retrieve the second Green Star.
Green Star #3
The Warp Box places you next to a ? Block that contains a Mega Mushroom. Get it and quickly move on to the narrow walkways up ahead. The third Green Star is on the right side of the walkways, but you can reach it only while under the effects of the Mega Mushroom. Use ground pounds to take out the Ty-foos and Octoombas on the walkways while you rush for the star.
The final task is to clear the rear of the ship of all the Bullies and Ty-foos. Fortunately, there are Mega Mushrooms available. With well-placed ground pounds, you can easily wipe the baddies out. A Warp Box appears once the deck is cleared of Bullies, taking you to the Goal Pole zone.