Bipedalism (Ancestors: The Humankind Odyssey)

Lord hominids, formed some question.Pumped to have two skill of bipedalism, initial and reinforced supposedly supposedly possible to walk.
I learned that you can get up on his hind legs by pressing the space bar, even for the sample dropped to the ground a meteorite, but the buttons are as not, and clicking it does not work.
Tell me that this could be the problem?