Act 2 builds upon the previous Act's mechanics, featuring more intricate spring and bumper sequences. You'll encounter more Roller enemies, which can be tricky to hit if they're rolling towards you. Wait for them to uncurl before attacking. There are also sections with moving platforms that require precise timing to jump between.
This Act features several 'half-pipes' or U-shaped sections where you can gain immense speed by rolling back and forth. Use the Spin Dash at the bottom to launch yourself high out of these sections, often revealing hidden paths or power-ups. There's another 1-Up Monitor to be found: after a long vertical ascent using multiple springs, you'll land on a platform. Instead of going right, look for a small opening to the left that leads to the extra life. Mastering the flow of this zone is key to finding all its secrets and completing it efficiently.