Act 2 intensifies the volcanic hazards with more complex platforming sequences and increased enemy density. You'll encounter more moving platforms over lava, some of which require you to quickly jump between them. The second Special Ring is often located in a hidden cave or behind a series of destructible blocks that require a Spin Dash to break through. Utilize the updrafts to reach higher sections, but be mindful of enemies that might be waiting. This act also features more grind rails, which can be a safe way to traverse dangerous areas, but watch out for gaps. Prepare for the boss battle at the end of this act by ensuring you have a good stock of rings.
