Hop onto the ? Block at Point 1, then jump straight up to find a Super Star hidden in an Invisible Block.
Hit the Invisible Blocks at Point 2 to reveal a Beanstalk, then climb up to find a hidden stash of coins!
The first Star Coin is floating above the barrels at Point 3. Wait for a Cheep Cheep to pass through the area, then jump onto the enemy and bounce up to the Star Coin.
One of the Blocks at Point 4 contains a ? Switch. After you find it, activate the ? Switch to release a stash of coins from the nearby pipe.
The second Star Coin is hidden above the rotating platforms at Point 5. Clear away the Piranha Plant at the top of the screen, or wait for it to pull into its pipe before you attempt to enter the hidden enclosure.
When the path is clear, wall jump off of the pipe entrance, then make a running leap up to the Star Coin.
The third Star Coin is hidden behind one of the barrels at Point 6. Jump onto the barrel to force it under the water’s surface. Allow yourself to sink down until you collect the Star Coin.