The Friendly Butterfly Simulator ( Name is somewhat unrelated ) is all about building structures.

Structures that will turn you into a true engineer. At least, that’s what we hope. Otherwise, little pigs will have to die in your name. 

The gameplay is simple. 

Pigs are attacked by other animals, and you have to build them a house.

Use your mouse to place the parts. For experienced engineers, use the mouse wheel to rotate the objects.

To give even beginner engineers a good experience, you can right-click to dismantle objects.

Once you’ve finished building the house, the attack begins in waves.

If all the pigs survive, you pass; if even one dies, you have to repeat the level.

Summary:

Left mouse button: Select and place objects

Mouse wheel: Rotate objects

Right mouse button: Dismantle objects

Attack: In waves after you’ve finished building

Goal: ALL pigs must survive