I love that you want to keep playing! I need to create more incentive for players to do this, and power ups would be a great addition. I have other things in mind too that will come with time.
Very fair critique on the wall graphics too, it was a quick hack to have something delete a node as it moves off screen and reconnect a new one on the other side (to save resources and create an infinite space)
Thanks so much for playing and rating, some very inspiring words :)