This puzzle is among the very nice offline set of Simon Tatham's "portable puzzles", with the name of "Untangle" [1]<p>[1] <a href="https://www.chiark.greenend.org.uk/~sgtatham/puzzles/" rel="nofollow">https://www.chiark.greenend.org.uk/~sgtatham/puzzles/</a>
It annoys me that there is an invisible rectangular border to the play area. The flowing background colors suggest the play area is the browser window but not so. I could do with more stretch room.<p>Also (Chrome on MacOS) if you drag a node to the border and it stops, the node is now stuck to the mouse and you have to click to drop it.
Cool puzzle, and really slick interface.<p>My one bit of feedback would be that you should make it get more difficult more quickly. I lost interest and stopped playing it because it didn't seem to be getting substantially harder, it was just basically the same thing over and over again, but the design of the puzzle is good and means it should be easy to make more difficult levels.<p>Perhaps you could have a difficulty selector so that the player can advance at his own pace.<p>You could also introduce a little twist after a while where some of the points are fixed in space, and you must rearrange the others around the fixed ones, instead of being able to move all of them.<p>You could potentially also make different types of edge (e.g. red edges in addition to the green edges), and for example a red may cross a green, but not another red.
A bit disappointed there was no reward for finishing all 20 puzzles, but that was neat :). I wish the sandbox were big enough though as I kept hitting the invisible edges multiple times per round.
Really missed a chance there to make the final boss the complete graph on 5 vertices.<p>Pic: <a href="https://en.m.wikipedia.org/wiki/File:Complete_graph_K5.svg" rel="nofollow">https://en.m.wikipedia.org/wiki/File:Complete_graph_K5.svg</a><p>Why: <a href="https://en.m.wikipedia.org/wiki/Kuratowski%27s_theorem" rel="nofollow">https://en.m.wikipedia.org/wiki/Kuratowski%27s_theorem</a>
Reminds me of World of Warcraft The Shortest Distance minigame <a href="https://www.youtube.com/watch?v=GpsoFp2BcSA&feature=youtu.be&t=0m00s" rel="nofollow">https://www.youtube.com/watch?v=GpsoFp2BcSA&feature=youtu.be...</a>