Thank you! In terms of third/fourth connections to knots: they are not possible. Knots have one input and one output, attempting to connect more will not work. Knots do have directionality, they have an input, and an output. The knot is shaped like a C and you can see the output coming out of the hole of the c, the input can go in any of the other three sides. I'm glad you liked SUBLEQ! I made this as a little prototype for a similar Zachtronics-style puzzle game, so I may continue this concept as part of a larger game. Thanks for playing : )