>>did you guys see the updates to the game?
>
>The author seems to have read this thread :).
>
>The good side of having a "suboptimal" ((C) M$) machine is that I see the slowdowns almost nobody else sees :). Now it's slightly slow in the beginning of the higher levels, since it seems to be checking any existing crossings for the currently moved lines, and there's a lot of those when you start. But as these clear up, it's getting faster.

In the latest version, it will only check for a solution if you tell it so. It takes a long while in the higher levels, but only once; not every time you move a dot. Also, the Flash player no longer asks you whether you want to interrupt the script - I am sure this is because of the new progress bar.

The other great improvement is the button "Load progress" which lets you continue with the last level you left (the level is apparently re-generated). (I tried it by downloading the Flash file to my computer; I have no idea where the progress is saved.)

So far, with these improvements, I have finished level 16. The screen is starting to get a little cluttered... BTW, it helps only in part to get a bigger screen, since the dots expand with the available screen size.