To access the pipe, the player must drop onto the next rolling hill and backtrack with a jump into the hidden area. There is a hidden Warp Pipe located below and to the left of the midway point.

This is followed by another rolling hill with a pair of pipes containing Piranha Plants and a larger platform on which the midway point sits. The next section has a pair of floating platforms guarded by Koopa Paratroopas and a Piranha Plant in a pipe below. The center brick on this platform contains a vine, which takes the player to a bonus area containing a Roulette Block. Once inside, simply jump up and grab the Moon Coin.The level starts with three rolling hills with Koopa Troopas and Koopa Paratroopas on them, followed by a larger platform. Go up and follow the coins to a green pipe. There, jump on the Lakitu and steal his cloud. Manipulate the lower set to enable you to reach the higher one.

You'll get the last Moon Coin in a similar way to the first one, albeit later on, where you'll see some small weight-sensitive platforms above the regular ones. By this time, the platform will have reset, so jump back over to the left and grab the coin. It's tricky to get with the Koopa Troopa patrolling nearby and Lakitu throwing Spinies at you, so you might find it easier to wait on the blue mushroom platform to the right until the Koopa Troopa has fallen into the pit.

The second Moon Coin is below some more weight-sensitive platforms after the checkpoint. Follow them up and to the right and you'll soon discover the first Moon Coin. Defeat the Lakitu that shows up here and take his cloud through the trail of coins. After the first set of weight-sensitive platforms, you will come to three blue mushroom platforms.

Super mario bros 2 world 1-6 star coins