New Super Mario Bros. Wii: 4-3 -- Mini Mario Goes to the Beach

This level has 1-armed crabs throwing stones at you. I kill some of them, and get and lose a Penguin Suit. I lose and get a Super Shroom. I get the first Star Coin and another Penguin Suit, which I lose to an Urchin. I skip the 2nd Star Coin. I get a Mini Shroom and reach the midgate, but do not power up. I can't enter any of the nearby mini pipes, so I keep moving. I then run on water to the mini pipe that has the 3rd Star Coin. I get a 100-coin 1-up and reach the goal.