Why my inventory doesn't open ? When I press TAB, it shows my cursor but not the inventory.. I can't use the inicial key bcz of that!

title (couldn't write a review, deleted the game after it tried to open my computer information)

Look, the note for the door code is very simple. And the solution SHOULD be very simple. But I've entered everything I can possibly enter into this door and nothing is working. There are 3 sets of flowers in the first room, 3 in the 2nd room, 1 in the 3rd room. So, the code SHOULD be 331. But it's not accepting that. or any variation of that. Or any of the other random codes I've entered to try to decipher this puzzle. So I guess my question is: what is the answer and why is not accepting the obvious sol...

how to find the keycard after opening the switch？

I have seen people say you press E, or press E and move your mouse to move the book in the very first room. I cannot get it any help?