Click the tree in the view, get 2 sun leaf, zoom out.
Click the vine on the right, get the magic wand and vine, zoom out.
Click the eye tree on right behind the vine, get 2 eyes, zoom out.
Click the nose tree on right, get a nose, zoom out.
Click the ear tree on left,get 2 ears, zoom out.
Click the mouth tree on left, get a mouth, zoom out.
Click the vine on left, click it again and add to the inventory, zoom out.
Go right.
Click the tree on left, attach the sun leaf to it, get the root, zoom out.
Click the woodpile on the left corner, drag the magic wand to it, get the root, zoom out.
Click the ground between the two trees on the left, drag the magic wand to it, get the pot, zoom out.
Click the tree on the right, drag the pot to it, get the root from it, zoom out.
Click the tree behind the clam, get the hanging carbon-Di-oxide, zoom out.
Click the tree on the left between the woodpile and ground, drag the carbon-Di-oxide to it, get the root, zoom out.
Go left.
Click the tree on the view, attach the organs to it, then attach roots to it, get the male mermaid, zoom out.
Go right.
Click the mermaid to open a new window.
Give the vine to it, get 2 diamonds, close window.
Click the magic cup on the right, put the diamonds into the cup, get 3 gems, zoom out.
Click the clam, attach the gems to it.

Congratulations! you have made the mermaid lovers escape.