New Super Mario Bros./World 8-6

What luck! You'll find yourself in an active volcano. It's about to erupt, so make haste and climb out of this fiery death trap. Don't dawdle, or you'll be engulfed by molten rock. Some of Bowser Jr.'s fearless troops still patrol inside this volcano, so you'll have to deal with them as well.

Level walkthrough
As you begin, you'll find that you're trapped in a small alcove with seemingly no way to escape. However, if you move to the left, you will end up at the right side of the screen. In fact, this entire level uses the same wraparound mechanic that you might have encountered in World 7-2. Keep this feature in mind whenever you're stuck or need to get collectables. On the topic of reused mechanics, this course also features the rising lava from World 4-Tower. The lava forces you to keep moving up; take too long and you may become trapped and doomed.

Jump to the higher ledge to the left, then get a power-up from the block here. Watch out for the red Koopa Troopas roaming on the platforms. One will be walking on a thin orange platform that you have not encountered since World 2. As a reminder, these platforms can't be destroyed or passed from underneath, but you can defeat enemies by bumping into them below. Jump from the orange platform to the ledge above, then hop into the cannon pipe. Let it launch you down the left and wraparound to the right for the first Star Coin.

Back on the left, quickly climb up the stairs and hop up the next ledge. Here, there are numerous Goombas, and more will appear from a Goomba-spawning pipe above. There's a block containing a power-up above said pipe. Get on to the ledge made of solid blocks to activate the checkpoint. Now, you must advance upward using spin blocks. Use the spin block to the right, then go left and use the higher spin block there. Launch from the next spin block to go past the ledge. Drill down when you're above the brick blocks to get to the second Star Coin.

Jump out and up the steps and wraparound to the right. Use the last Spin Block to launch yourself up to the final challenge. There are more of the orange platforms, and now they have Spinies walking on top. As you ascend, try to remain at the right side of the screen. When you see a pipe, jump up to the right of it to reach an alcove with the last Star Coin. Make your way to the ledge on the right, then jump up and into the cannon pipe. You'll be launched out of the volcano and to the safety of the surface. Move left to find a spin block, then launch yourself and hover to the right to get to the top of the flagpole.

Star Coins

 * 1) Hop into the first cannon pipe to be launched over the ledge on the left. Wraparound to the right side of the screen to get the Star Coin.
 * 2) The second Star Coin is surrounded by blocks. Jump off the nearby spin block and fly above the Star Coin, then drill down to collect it.
 * 3) The Star Coin is to the right of the cannon pipe. Stay at the right side of the screen or use the wraparound feature to get to it.