This level is entirely made of cookies, chocolates and other confectionary. The enemies are Ant Troopers and Skipsqueaks.
Green Star 1: On the ledge with the second giant piranha plant there are two gears. Jump on the one to the right and then jump up onto the one on the left it will bring you up a little way and you can either use the boomerang or jump across to nab it.
Green Star 2: Same idea as the stamp. On the second part with the Ant Troopers moving around, just fall down the first hole where the Ant Troopers are coming out of or to the left of them there is a hidden pipe above you can jump into. You will fall into a little area that will take you to a warp box that takes you to a giant spinning cookie. Be fast because it is timed. The star will be on the right side.
Green Star 3: The last star is on a cake by the flagpole. When you get there walk around the flagpole and you will need to run and jump to the island below. There you will need to catch a rabbit who will give you the star.
In the area with the Ant Troopers coming out of a hole in the ground, there is a little area under the Ant Troopers. you can either jump into the hole behind the Ant Troopers or just jump to the right of them and jump into the hidden pipe above.