Blue Coin Bustle
Leave and return to find a newly placed Blue button to ground pound –activating a blue coin time trial.
The first coins are in a straight line; just walk forward, around the tower, and forward again. The next set appear in a zigzag along the ramp.
At the top, turn left and run forward, grabbing the coins in a line and up the stairs. Turn left and grab the last few on the stairs and drop down
The next set is pretty straight forward, just use a fire-flower to reveal your path. Make your way around to the right side of the tower to get to the next set which is also straightforward until the end.
You’ll need to jump over to the last 6 coins, so be careful not to fall off or you’ll have to start over.
The shine will spawn next to the blue button at the start.