I did eventually watch it all, (or rather painstakingly wait for each page to finish animating before reading it) and found that the only thing I'd been confused about was having to right-click to connect the stones. I could imagine your game trying to "find" each shape on the grid without needing to connect them (after you forge), or some other button/toggle to switch to "connecting" mode, so it's more obvious to the user they need to do that. FWIW, I played on a mac, and right-click (especially combined with drag) just isn't as prevalent an input method there.
Thanks for the feedback! Yeah, it could be nice to just be able to connect any stones to make the crystals, without having to obnoxiously connect lines with right click. To your point about Mac's and right clicks - I could also let the player choose a color before connecting stones, and draw lines that way.