New Super Mario Bros.: 6-6

This can be a very tricky level. There are spin springs and Chomps attached to posts. We can ground pound the posts to free the Chomps. You might get the Star Coins out of order. The 2nd Star Coin is at the top of the level, over a Chomp's post. If you go left and down, and pound a stack of brick blocks on the way, you'll find a P-Switch. It will turn brick blocks into coins so you can reach the 1st Star Coin. Return to the top of the level and go down to the right while spinning to collect the Red Coins. Getting the 3rd Star Coin is very tricky and you may only have one shot at this per attempt at the level. Clear all of the brick blocks in the channel over the spin spring, then spring off of it. While spinning down and to the right, bounce off of a Parakoopa and hit the P-Switch above it. This will turn the brick blocks blocking the green pipe to the right into coins. While spinning and slowly descending, bounce off the red Koopa beneath the green pipe and go through the green pipe before the timer runs out. This will take you to the 3rd Star Coin. Afterwards, you'll use several cannons to make your way up. At the top will be a large set of cannons. The second cannon from the right will take you to the flag.