Run across the bridge. Jump below and boost over to first red coin.

Up in mushroom tree, shoot blue bird - blue coin. Red coin up there.

Red coin in pool at end of level

From bridge on R is big tree - go on tree and go far R - over bridge is the coin

Red coin in tall grass on left by swing.

Red coin behind big end tree in beehive

Red coin in giant pile of crates

Now head up in tree. do spin jump - rocket boost to get up from uppermost mushroom. At tree top head towards clouds. At end of leaf, a fluff will come down to you. Use jump to grab it and float out to the shine in the clouds. Jump down and you're set! If you're too close be careful it can hit you and hurt you.

Super Mario Sunshine Walkthrough