It's a comment I've been receiving for a while now. I'm working on a mini-tutorial that I would like to add to the game ASAP.
Consider only the middle pip on that side when connecting the dice side-by-side. A 6 can connect to another 6 if they are rotated the same way and not touching by the sides that lack a pip. The only other dice that can touch by sides are the odd-numbered dice if their middle pip is pulled to the side.
Apologies for the inconvenience, and thank you for the comment! :) I appreciate it