Interesting mechanic, It was weird that lines can pass through walls. I really liked your intro style!
Thank you. Totally agree with the cords clipping.
I initially wanted to make the cords constrain enemy movement too and make that important to the game. Then they would be RigidBody2Ds and would wrap around walls. I sunk a good deal of time into that but it turned out to be beyond my level of understanding. My failed experiments are still in the source code, embarassingly.