Very pretty visuals! I would have loved some more feedback on what was happening in the game and which nodes cannot be visited anymore. Puzzle design also felt a little off, for the first two levels I just randomly clicked around without much thought and while the third one seemed like an interesting conundrum, the solution wasn't as satisfying as I had hoped. Still, this seems like a cool twist on graph theory puzzles and I think with some more time, this could turn into a neat little puzzler!