Hm, I tested the game really thoroughly and could manage to build up to 200-300 lines or even more (which takes about 1 hour of gameplay) and a score up to 110.000 (see the mochiads version here: https://www.mochiads.com/community/games/ninamaya/undead-lines ) so I thought it was weighed out quite okay. BUT I made things a bit easier by adding a joker-stone every 10 lines and a path preview. This still should stay a hard challange and the game always ends if you can't move anymore.
 "Spider Lines"){kind=icon}