I realized that it's hard to tell that there is a square of plexiglass for each button. You step on the plexi and as long as at least one of the little red buttons (of a standard four-switch set) gets hit by the plexi, the button is activated. I need to paint the plexi with arrow graphics, but I haven't come up with a really good way to do it yet. Honestly, the paint isn't all that important to me right now, so it doesn't bother my that it's not done.