New Super Mario Bros. Wii 4-Ghost House QSC

The 1st and 3rd Star Coins were difficult for me to find. I got the 1st Star Coin by standing on the 6th platform from the left and waiting for it to descend. The Star Coin is hidden behind it. To get the 3rd Star Coin, I stood on the 4th platform from the right and waited for it to descend, revealing a hidden door. I dodged the floating torches and jumped from the platform with the 2nd door to get the 3rd Star Coin. I went through the last door for the red goal.