As you play through this level, use the Wigglers to bounce up to otherwise unreachable objects.
When you pass through the Red Ring at Point 2, the first four red coins appear on the crates to the left. Try to collect them before the remaining red coins parachute into the area.
The first Star Coin is floating above the Wiggler at Point 3. Hop onto the Wiggler and use a well-timed bounce to reach the Star Coin.
Just before the exit of this part of the level there is a ? Switch. Jump on the Wiggler to hit this switch to make it rain Coins from the Pipe above.
When you reach Point 4, wait for the water level to drop, then dash along the platform to grab the Star Coin. Move quickly to return to solid ground before the water rises back up.
Hit the Invisible Block at Point 5 to reveal a Beanstalk. After it grows, climb up to find a hidden area with a Koopa, a Gold Ring, and plenty of space to bounce a Gold Shell!
To collect the third Star Coin, stand on the crate until the water level begins to drop, then make a running leap toward the Star Coin. Perform a wall jump to gain a little extra height.
To find the level’s secret exit, stomp the Koopa at Point 7 and wait for the water level to drop. When it does, toss the shell into the Blocks to the right. Wait for the water to rise and drop one more time, then dash toward the remaining Block and slide through the gap. Follow the path through the pipe and touch the Goal Pole to unlock the path to World 3-B.