Nice work. It takes a few goes to get the hang of it but when you do it's a fun challenge. I did have trouble if I ever needed to pull a third line out of the same color's power, it was very picky about where I could click to start the line. If I wasn't in the right spot it wouldn't draw.
I feel like the buttons for turning the generators on and off are too small. I would love to be able to use the keyboard to do that but I know that's asking a bit much. I enjoy the precision movement while drawing a path, less so when clicking a button. Great job, I could definitely play more levels of this.