I played with it for a while, I believe it could improve its user experience. The first button of the hammer to the left doesn't work. It is not clear what each icon from the left means. I did found the documentation, but it would be nice to have it more at hand, its hidden. Also couldn't draw links between the boxes, I was lazy but couldn't figure it out intuitively. I would add some buttons to the boxes to draw links between them, like Miro does. Just some observations, found it interesting though. I am curious about the stack you used to build it.