I mean, after my domino chain kept collapsing, I figured out the spacing issue, and now the satisfying click is just right. | Oddly Satisfying Vids - SMM Buzz
What kind of surface are you setting them up on? I used to fight with that on an old wooden table that wasn't totally flat. The fix for me was putting down a sheet of poster board first to make a perfectly even base. That way, the spacing stays consistent from one end to the other and nothing tips over early.