You can't open them until he is playing for a second time, but then you just click on them when your hand says open. When he is playing as you look for Manny, you have to follow Manny to the school and get the Twisted Wizard guide from Greg's locker.
open the curtains to the left of him; it will make him stop playing because he hates sunlight.
You can't open the door. It has no use for completing Wimpy Wonderland
you cant
Mannys room
Open Greg's locker.
Open Greg's locker.
you don't
You open the blinds
you cant.
you have to get the scrap of paper with the numbers on it.
you open the blinds at Greg's house
You shut the front door