New Super Mario Bros.: 3-C

It's another water level. You'll want to stay out of the water to dodge the Spike Bass. You can defeat it with fireballs, but it will infinitely respawn. We have to hop on log platforms. The thinner logs will drop into the water if you land on them. The first Star Coin is below a couple of thinner logs, so let them drop, collect the Star Coin, then hop back up to safety. The Spike Bass will disappear when the jumping Cheep Cheep appear. Dodge them until you reach the midpoint, when the Spike Bass reappears. The second Star Coin is also under a log. Go under the log, then wall jump up to safety. Next is a P-Switch that turns coins into blocks so you can reach the third Star Coin by jumping into the red pipe overhead. The pipe will also take you to the goal, which opens a path to the Castle.