Floor 26: Remove all the batteries, then places them in the slots to make the bar green. You can follow my screenshot, just put the last two on the door:
Floor 27: Move the white block on the right to reveal a crack in the wall. Use the hammer to break the wall and take the crank. Place the crank in the hole in the door and turn it until all the lights turn green.
Floor 28: Treat the dots above the door like morse code. Tap two times quickly, then wait for the rainbow to disappear. Then continue, waiting at each space. So 2 taps, pause, 3 taps, pause, 1 tap, pause, 2 taps. And it should open.
Floor 29: Lay the phone flat on its back and wait for the numbers to count down to 1. Then the bomb will explode the doors open.
Floor 30: Look at the current time and set the clock to that time. Then pull the lever down to open the door.
