I wasn't able to figure out what I was missing. I stepped onto the 2 squares, they became blue/cyan and then I went to the door. Pressed the switch and nothing seemed to change.
Yes, I've found them a bit overwhelming initially and was unsure what some of them meant (charging objects and the difference between the them). When playing I started understanding what those pictures meant.
I'll give it a go again later in the day to try and find out what I missed :)