Scan stopped working after the first upgrade :(
UPD: oh, you need to scan from nodes other than Home.
About controls: weird that mouse wheel can zoom in but not out.
Overall an interesting game, but probably needs more things to do with the nodes (maybe you can install different programs onto the nodes that do some additional things?) and a reason to expand further out (since income per second is limited by the throughput of whatever is directly neighboring the Home node).