You will be able to raise structures after you find the Totems of Logic, Passion and Joy. After finding them, bump against them and they will turn into buttons in the lower right-hand. To raise a Brutal Pyramid, press the buttons in this order: blue, red, blue, red, yellow, yellow. Note: Occasionally a different type of structure may appear.

Stalkers are the pyramid-shaped creatures that float around. When one is around you will hear a humming noise that gets louder as they get closer. Make sure your little cube has a color. You also need to have some stars to inspire a Stalker. Approach them, then bump into them several times in a row. You will lose a star each time. After at least five bumps, the Stalker will change colors, which is when it becomes inspired. You can get stars by bumping into trees. Sometimes trees will drop stars instead of fruits. Note: Bumping into a tree too many times will destroy it.