Elevator

Well, so we made it into the elevator. It's not very clean in here anyways, so take some dust from the huge flowerpot and pour it all over the place. A fast and tidy cleanobot comes along and sucks in all the dust. But we are even faster than him, so pick him up while he is in front of you. After shaking the sucker for a while he will drop a lightbulb. There is no other place for the lightbulb than in the upper right corner on the elevator panel. So we just found the first bulb for the elevator. Now we can go upstairs, but we don't know the right combination yet. The leaf of the plant is in the way so step under it and expand your robot to reach up for it. Pull down the leaf and you can see the pentagram beeing the symbol for the top floor. Use the panel and enter the pentagram as the destination. We will go up in no time.