Round Tower

Walkthrough: Once at the top of Round Tower, new platforms will be created leading you the the large island habitat to the west. While on these platforms, try using Cappy on the objects floating in air to reach and obtain more Coins. These objects can also be used to create shock waves, ones that can break open blocks that will create more platforms for Mario so he can obtain hidden Purple Coins. However, don't forget to dodge the blast from the shock wave, as it can do damage to Mario.

As the platforms begins to descend, head to the far right platform with Mario to begin the final hike to the island habitat. There will be even more shock waves here, ones that will force Mario to carefully jump over. Be on the lookout for more Coins as you dodge the blasts; otherwise, head straight to the island.