The Day the Earth Still Stood

Yellow room
-Click on the clothes by the bed to get a zoomed in view. Take a skelleton key from the right pocket of the blue trousers. Close the view by clicking the clothes again.
-Open the lockers on the back wall.
The first locker to the left will give you a radiation suit.
The third locker will give you a number sequence: 14-2-1-2-1-3-1-2.
The fourth locker gives you a clue: Even-up, Odd-down.
-Turn the lights off to the left of the door. See a code of 4 digits on the right wall, 1337.
-Turn the lights on again.
-Zoom on the computer.
-Enter password (from the wall) and press confirm.
-Open the trash can to see a number sequence starting with 14-12-11-9-****.
-Open the upper left icon to see a shopping list.
-Turn off the computer in lower right corner.
-Click on the door.
-Move the skelleton key up and down. Use the clues from the lockers and the computer. Solution at the end of the walkthrough.
-Open the door when it is unlocked and move forward.

Hallway
-There is a mouse hole by the floor to the left.
-Click in it to get a key #1.
-Click on the painting on the wall, and then in the lower left corner to get a small note with a number code. Tiny numbers, hard to read: 14722.
-Enter through the yellow door to the left.

Bathroom
-Click on the wash bin to see a zoomed in view. See a key and a plug. Click on the plug to empty the bin and take the key #2.
-Click on the upper drawer to the left and get a code box with 5 numbers. You already have five numbers from the painting clue. Enter those and press the round button to the right. Get a wrench.
-Move back to the hallway by pressing the green round button to the right in your inventory.

Hallway
-Use your key on the locker on the right wall. Get a string from inside.
-Move back to the bathroom through the yellow door.

Bathroom
-Use the wrench by the floor to the left of the bath tub to make the water flow through the pipes.
-Put your string on the right side of the upper water tank of the toilet. Pull the string. Click inside the toilet to see a 4 number code (very tiny numbers, but you also see them clear on the lower part of your screen), 9323.
-Exit the bathroom into the hallway.

Hallway
-Turn around by pressing the arrow to the left.
-Zoom on the code panel to the left of the door. Enter the code from the toilet. Press OK. Enter through the door.

Purple room
-Take the key from the floor between the two gas tanks to the right.
-Return to the yellow room wherer you started (go left, left, right).
-Open the second top cabinet from the left with your key, get a crowbar.
-Return to the purple room again.
-Use the crowbar on the glass on the right side of the desk.
-Click on the white square where the glass was.
-Click on the top left side of the screen above to enter a 4 digit code.
The code is from the shopping list on the computer, 6251. Press OK.

Exit through purple door, turn around and exit through the back door.
You are out!

Solution to the first door.
The first numbers you got from the locker are:
14-2-1-2-1-3-1-2
The ones you got from the computer are:
14-12-11-9-****
To get these numbers you need to subtract the first numbers from 14 one at a time.
14-2=12
12-1=11
11-2=9
9-1=8
8-3=5
5-1=4
4-2=2
Your new sequence is: 14, 12, 11, 9, 8, 5, 4, 2.
To use the skelleton key you need to use the Even-up, Odd-down clue as well and press the arrows: up for even numbers, down for odd numbers.
PRESS THE ARROWS:
up, up, down, down, up, down, up, up.
Then press ”check” to unlock the door.