New Super Mario Bros.: 2-2

This level features some arcade-style platforms. After a short distance, Lakitu appears to cause chaos with his Spiny eggs. Stomping on him will get rid of him temporarily, but if you kill him with a fireball, his cloud remains and you can hop in and float around for a while. There are coins high above. We can reach Lakitu from some blocks early on. Straight up from that point is the first Star Coin. For the second Star Coin, we need to ground pound some brick blocks between a green anad red pipe. To reach the third, we need to take Lakitu's cloud past the midpoint and follow a trail of coins to a yellow pipe in the sky. This takes us to Coin Heaven, where the third Star Coin is. Hop into a green pipe, which serves as a cannon to reach it. The flagpoile is nearby.