There’s an Invisible Block located at Point 1. When the platform swings into position, jump up to reveal the hidden Beanstalk. If you wish to use the level’s secret exit, climb the Beanstalk up to the next area.
When you reach the top of the Beanstalk, follow the path to find a Big Boo waiting near a ? Switch. Stomp the ? Switch to reveal four doors. The correct door is located behind the Big Boo. Draw the enemy away from the door, then slip past it and head outside. After you reach the secret Goal Pole, World 5-A becomes available on the Map Screen.
The first Star Coin is located at Point 2. To find it, drop down along the swinging platforms on the room’s right side. Jump over to grab the Star Coin, then climb back up to the top of the room.
The second Star Coin is located in a room above the level’s main path. As you jump along the swinging platforms, hop onto the pole at Point 3 and climb up to the next area.
When you reach the top of the pole, follow the platforms to the Star Coin at the top of the room.
The third Star Coin is located in a room above the level’s main path. Climb the pole at Point 4 to find a long set of stairs.
Make your way to the top of the stairs to find the level’s last Star Coin.