I loved the minimalist graphics and controls, it looks quite stylish and immediately understandable. The levels were quite fun, challenging without being frustrating. I could see myself playing this on my smartphone while on my commute, would LOVE a mobile port in future. My only quibble is that I wish you could drag over multiple nodes in one go, and to have an undo button instead of having to restart the entire level. Otherwise this was a great game that I hope to see on Android someday, haha!
By the way, we played your game on our stream last night!