Pick up one of the barrels at Point 1 and jump into the air before throwing it right. The barrel should roll up the hill and smack the Stone Spike before he can regurgitate another spiked ball and hurl it at you. Of course, you can always just blast him with a fireball if you’re Fire Mario.
Hit the P Switch at Point 2 to turn the Blocks into coins and reveal several blue coins. When the Blocks transform into coins, the Stone Spike will drop from his elevated position. Once he’s at a lower level, either wait until he throws a spiked ball and then bounce on his head to eliminate him, or drop down below him and collect all the blue coins.
When the timer on the P Switch runs out, he’ll drop one more time to the ground level allowing you to pass over him via the row of bricks over his head.
Hop onto the platform at Point 3 and ride it up. As the platform rises, it will begin to pick up several Red Koopas along the way. If you’re Fire or Ice Mario, blast the Koopas and eliminate them quickly.
If you don’t have any power-ups, knock the closest Koopa into its shell, then kick it so that it bounces back and forth against both walls. Stay near the center of the platform and jump over the shell as it approaches you. By the time you reach the top, you’ll even get a 1-Up!
Grab a barrel at Point 5 and carry it to the right. Hug the small ledge below the Stone Spike, then hurl the barrel at him before he tosses another spiked ball!
At Point 6 is another group of barrels. Pick up one and carry it to the area on the right. Above you are several more Stone Spikes. Jump up through the platform overhead and hurl the barrel at the first baddie. Continue jumping up through the platforms until you reach the top, then eliminate the enemy on the left.
Ride the platform at Point 8 down to a pipe on the left. Go through the pipe to find a secret area with a Mini Mushroom and several coins. Use the Mini Mushroom to become itty-bitty and then grab the coins by skipping along the water, back to the pipe from which you entered.