Got the dynamic walls up. Now it's fun just making wall designs. Also refreshes walls designs when neighbors are destroyed. Added particle effects upon collisions with creeps.
Creeps also weren't dying in collisions, just doing damage and passing on through. taken care of, with the exception down below.
Next up: Power
(1) Creeps seem to hold what I think is the version of the map that was in play when they were created in memory, so sometimes pass through the current walls.