The short 100 second timer on this level will force you to rush but 100 seconds is plenty to snag everything. Start by turning around and jump off the back-center for Green Star #1 . Move up to the rotating platform and leap past the Piranha Plant to reach the second large platform. If you maintained your speed it’s simple to dash to the Rabbit that holds Green Star #2 , just chase it around the fountain.
Cross the rotating platforms ahead, going left to the Peach Character Switch if you are playing as Princess Peach to claim the Stamp – you can always come back if you aren’t. Jump past the Goombas to the raised platform with the Cloud Cannon. Race through the clouds after obtaining the Super Star to gain some extra time via Green +Clocks and Green Star #3 with a great leap at the end.
When you emerge the Goal Pole is just nearby, so make a good jump.