This is the stupidest game I have ever played.
Tutorial mentions Q.
Doesn't mention the portals you'll need to use.
So you navigate to controls menu (annoying that I had to do that when I actually selected TUTORIAL) then I make a portal to the button room and I go in the button room and pick up the box and set it on the button.
Nope!
The cube has to fall on the button.
What?
This is very stupid and I was happy to close it immediately.