Yeah I thought it would work like that too since it used to with Reddit. Still shows the color blocks. Also somehow in my mobile browser it's the same way!
The squares don't hide anything. That's the attempts at this puzzle. The above screenshot shows I got all 4 connections in 4 goes, with no mistakes. I got the easiest (yellow) first, then the hardest (purple), then the 2nd hardest (blue), and finally the 2nd easiest (green).
If I had made a mistake on that first guess and included 3 of the words from the easiest category but one from the 2nd hardest, it might have looked like π¨π¦π¨π¨ instead.