You’re at a party with Ingrid Bergman.
Talk to her and she’ll tell you about the popcorn. You need to get her the popcorn. The way you complete your mission will change the outcome. To get all 8 endings:
Skeleton:
Talk to the clowns and ask for popcorn. Give the popcorn to Ingrid.
Naked male:
Talk to the clowns and ask for popcorn. Use the radio to dance for Ingrid. Give the popcorn to Ingrid.
Flintstone:
Talk to the clowns and ask for popcorn. Talk some more to the clowns and ask about the other business. They will give you some cream. Use the radio to dance for Ingrid and the cream will become butter. Use the butter on the popcorn. Give the popcorn to Ingrid.
Elaine:
Talk to the clowns and ask for popcorn. Take the handkerchief from the radiator. Use the radio to dance for Ingrid and the handkerchief will become sweaty. Put the handkerchief back on the radiator to let the salt dry. Put the salt on popcorn. Give the popcorn to Ingrid.
Naked female:
Talk to the clowns and ask for popcorn. Talk some more and ask about the other business. They’ll give you the cream. Take the handkerchief from the radiator. Use the radio to dance for Ingrid and the cream will become butter. The handkerchief will become sweaty. Put the handkerchief back on the radiator to let the salt dry. Use the butter on the popcorn. Put the salt on popcorn. Give the popcorn to Ingrid.
Yourself:
Talk to the clowns and ask for popcorn. Talk some more to the clowns and ask about the other business. They will give you some cream. Use the radio to dance for Ingrid and the cream will become butter. Use the radio again to dance some more. Use the butter on the popcorn. Give the popcorn to Ingrid.
Guybrush:
Talk to the clowns and ask for popcorn. Take the handkerchief from the radiator. Use the radio to dance for Ingrid and the handkerchief will become sweaty. Use the radio to dance some more. Put the handkerchief back on the radiator to let the salt dry. Put the salt on popcorn. Give the popcorn to Ingrid.
Naked female backwards:
Talk to the clowns and ask for popcorn. Talk some more and ask about the other business. They’ll give you the cream. Take the handkerchief from the radiator. Use the radio to dance for Ingrid and the cream will become butter. The handkerchief will become sweaty. Use the radio to dance some more. Put the handkerchief back on the radiator to let the salt dry. Use the butter on the popcorn. Put the salt on popcorn. Give the popcorn to Ingrid.
Game source: A copy of the game was found here on the internet.