How about time travel? Exactly, and our hero from the logic game "Chronotron" did not refuse it. But he does all this for the sake of special buttons. Why does he need them? Our hero simply collected many music players. When he was moving them to a new place, all the players fell, and the buttons fell out, so our hero is trying to get them back. But this is quite a difficult task, since all the buttons are guarded by special devices. And who invented them? One little evil genius. Okay, let's help our hero, otherwise he will worry. You must first perform all actions, then go to the "Time Booth" and travel back in time. You will see your past copy, which will exactly repeat all your previous actions. And during this time you will have to get to the button, and then to the booth. Good luck!