The green mask is on a scarecrow at the end of the "behind enemy lines" adventure with Snoopy. After avoiding the searchlights, go right and get the mask, which you have to wear (temporarily) to enter the party.
you grab the mask on the scarecrow and go into the house
The pumpkin head is one of the 4 games at the party, which occurs after Snoppy's adventure. The "pumpkin head" costume is not on Great Pumpkin Island. It is a costume change that can be triggered (and reversed!) by typing the costumizer command : Ctrl +Shift +P (all at once). This does not work as a costume on the island. You have to find the mask on the scarecrow and wear it.
There is no key. Get the mask from the scarecrow and wear it. Knock on the door and you will be at the Halloween party.
Get the mask from the scarecrow and wear it. Knock on the door and you will be at the Halloween party.
There is no pigeon on great pumpkin island.
The pumpkin patch is to the right on Great Pumpkin Island. It was the only area shown in the island preview.
you get by going to shark tooth island and getting a shark fin and you put it on and then go to the doctor and you should unlock the mask
No. And that is not how to get a costume for the Island's purposes. Ctrl + Shift + P toggles the "pumpkin head" jack o'lantern on the Costumizer. On Great Pumpkin Island, you have to get the costume that is provided on the island. At the end of Snoopy's Flying Ace adventure (dodging the searchlights) you arrive at a farmhouse. There is a mask on the scarecrow there. Get it and wear it when you knock on the door.
That is not a feature of the island. You can get a costume change using the costumizer by pressing the 3 keyboard keys Ctrl+Shift+P all at the same time. You remove it the same way. You cannot use this or any other costume for the halloween party on Great Pumpkin Island. You have to get the mask from the scarecrow in Snoopy's adventure.
There are no buildings or upper rooms on Great Pumpkin Island.
Once you have avoided the searchlights, take the mask from the scarecrow and wear it. Now when you knock on the door, they let you in.
The name of the island is Great Pumpkin Island. See the related question below.