Hi, thanks for your comment. It's okay that you didn't get how the puzzle works, I will try to explain here: You have input and output nodes (triangles). When you press start, game sends a signal at input node to the first connection. You can connect nodes using Right Mouse Button. But now you have a problem, that you can have only one connection from input node. So you need to use intersection, this is a flip-flop node, it sends first signal to the left connection, second to the right, third to left and so on. And now you can route signals wherever you want.
Here's the solution for the first level: (Also, next levels will introduce more nodes, and all of them explained in the top right corner in the puzzle screen)
Edit: I can't add an image to the comment, so here's the link https://imgur.com/a/f24nOiq