This should keep a completed level on the screen until you click to advance. Also, deleting links needs some work: I think the hit detection is too small. Al

This should keep a completed level on the screen until you click to advance. Also, deleting links needs some work: I think the hit detection is too small. Also, a mouse-only way to delete would be nice -- how about right clicking? Double clicking would be another possibility (and I assume more touch friendly).