Is there any way you can enter the area where you activate the "?" switch again? (you have to look in the sun in the castle main hall to get there). I know there's a star there that you can get by picking up the red coins, but I didn't do it and now I'm wondering whether I'll be able to get that star at all......

 

how do you do it, though? the same way you got there in the first place?

 

ye if it isnt working then just step bac a bit and look at th sun