I need to spend more time on predicting the intentions of the player :) if you click on your own tile and it looks like a cross attempt it's easier to determine than if you click on someone else's path. But that is something I would like to address in the future. Thanks for playing!
Nice game, I usually don't ask for clarifications if I'm not interested. I did study the website, and I didn't find "dragging", ist just says "LMB". For me that means clicking, and it does work for 3 levels, so it becomes hard to understand that clicking is more of an "accidentally" working mode.
But interface design is complicated, again, the game looks and plays fantastically, I'll play more of it later.