Just when it looks like you can go back to the village, a bird takes the Buffoon to the mountain.
Move the Stone
Have 
Fingus stand to the left of the ladder on the right
side of the screen.
Have 
Winkle lift the stone and have
Fingus click it while
Winkle is holding it.
Then have
Winkle walk to the top of the ladder and have
Fingus click the stone, and have
Winkle take the stone so it is at the top of the ladder on the
right.
Move the Head
Have Fingus stand on the lion's head and have
Winkle use the stone. Have
Fingus click on the
head and it will fall.
Reach the Shoulder
Now move the stone only once so it's to the right of the giant's hand.
Have Winkle stand on the lion's head and have
Fingus use the stone. Winkle will go to
the giant's shoulder. Have him go through the hole in the shoulder.
Reach the Floating Island
Now have Fingus stand on the lion's head and have
Winkle click the head statue. Fingus will
land on the floating island.
Get Both Goblins on the Floating Island
If you move the mouse over the middle of the stone that Fingus is standing on, it will be labeled !!!. Have
Fingus click the !!!
and he will stomp on it until it's at
Winkle's level. Have Winkle click on the rock
(labeled "rock" when you put the mouse over it)
to step on it.
Save the Game
The next part is tricky, so save the game to avoid having to get both goblins on the rock again.
Reach the Birds
When both goblins are on the floating rock, switch to Fingus
and click the air to the left of him so
he is standing on the left side of the rock.
Have Winkle
click the rock near the birds. If Fingus was standing on
the left side of the rock, he will automatically walk across
Winkle.
Free the Birds
Have Fingus use the file on the cage. Then have
Fingus take the key.
Return to the Beanstalk
That's all you can do here, so switch to Winkle and
move the cursor to the bottom-right of the screen until it turns into a
door icon, and click to go
to the area outside of the village, or move the mouse to the top of the screen and choose the
wooden sign, then click Plant to go to the
the area outside of the village.
Use the Key
Use the key on the door. Now you can click in the doorway to proceed to Tazaar's Laboratory.