Again if you want to find by yourself, don't read the guide or watch the pictures.

Someone asked me to do this guide so, here it comes :

-> First choice : Door on the right
-> Second choice : Go straight
-> When you reach the cargo lift, jump from it to reach the bridge.
-> Then go to the room with red and blue door : chose the blue one 3 times.
-> When the narrator asks you to rate the game, do it : you can rate whatever you want.
-> Lose at the baby game
-> Enjoy

That's it. :)