The goblins get the Buffoon down from the beanstalk, only to have to follow him to mushroom land.
Get a Bowling Ball
Have 
Winkle stand near the star to the right of the dome with
the checkerboard pattern on it. Then have 
Fingus click on the bowling pins. When the bowling ball is bouncing after it hits
the bowling pins, have
Winkle click on the star. You will get the bowling
ball.
Move the Safety Pin
Have Winkle walk past the creature that is holding cymbals.
Have him put the ball on the lid and have him stay on the lid with the ball.
Then have Fingus step
on the flagstone near the dome with
the checkerboard pattern on it. Winkle will land on the
right side of the screen, and the safety pin that was on the window frame
will land on the umbrella in the upper-right of the screen.
Get Another Bowling Ball
Have Winkle stand near the star to the right of the dome with
the checkerboard pattern on it. Then have Fingus click on the bowling pins. When the bowling ball is bouncing after it hits
the bowling pins, have
Winkle click on the star. You will get another bowling
ball.
Reach the Rainbow
Have Winkle walk past the creature that is holding cymbals.
Have him put the ball on the lid.
Then have him stand on the bottom of the catapult in the bottom-left of the
screen.
Then have Fingus step
on the flagstone near the dome with
the checkerboard pattern on it. Winkle will be launched
onto the rainbow.
Have Fingus go past the cymbal creature, then stand on the
flagstone above the cymbal creature. Have Winkle
click on the flagstone to the left of 
The Buffoon. Fingus will be launched up onto the rainbow.
Get the Safety Pin
Have Winkle go back and stand next to the flagstone next to
the checkered dome.
Have Fingus press the feeler on the giant person's hat,
then have him click
the bubble that
appeared. As soon as the bubble lands on the lid, have
Winkle step on the flagstone.
Fingus will go to the top of the umbrella. Have him take the
safety pin.
Get Yet Another Bowling Ball
Have Fingus go down to the ground. then
have Winkle stand near the star to the right of the dome with
the checkerboard pattern on it. Then have Fingus click on the bowling pins. When the bowling ball is bouncing after it hits
the bowling pins, have
Winkle click on the star. You will get yet
another bowling
ball.
Reach the Rainbow Again
Have Winkle walk past the creature that is holding cymbals.
Have him put the ball on the lid.
Then have him stand on the bottom of the catapult.
Then have Fingus step
on the flagstone near the dome with
the checkerboard pattern on it. Winkle will be launched
onto the rainbow.
Have Fingus go past the cymbal creature, then stand on the
flagstone above the cymbal creature. Have Winkle
click on the flagstone to the left of The Buffoon. Fingus will be launched up onto the rainbow.
Burst the Bubble
Have Winkle stand on the giant person's hat.
Have Fingus push the button next to
The Buffoon and, and when The Buffoon is fully
in the bubble blower, have
Winkle push the button on the feeler on the hat. Switch to
Fingus and have him use the safety pin on the bubble.
Now that The Buffoon is out of the bubble,
you will automatically return to the area outside the village.
Get the Key
Have The Buffoon stand on the bottom of the catapult. Have
Fingus stand next to the switch in the wall and have
Winkle stand next to the catapult.
Have Fingus press the switch, then when the key has
fully appeared out of the statue's eye,
have Winkle click on the catapult. A bird will fly past and
take both The Buffoon and the key.
Move to the Next Area
That is all you can do here for now, so just move the cursor to the end of the path between the beanstalk and the stone wall until it turns into a door icon, and click to go to the mountain, or move the mouse to the top of the screen and choose the wooden sign, then click Mountain to go to the mountain.