Finally, there was no "You win" screen. I got all nodes to 0 or above, and the game did not notice any change in state. I could no longer change values of any node, and it did not register my success. On Medium.
Thanks for your Feedback. As stated above this is just a Prototype/MVP, I am aware of the missing usability and features :). The shift action is actually a thing I have not thought off and will definitely be added to the roadmap.