Algodoo

This looks like it could be a useful tool (once I figure out how to use it)!

Thanks. I added instructions to the scene.

Instructions were well written and understandable.

Suggestion: for my own scenes I personally try not to make the user manually fiddle around with things like copy/paste arrays from one area to another, or manually make them add text to an array (such as the link thickness). It's too easy for humans to mess things up! I try to automate those kinds of tedious tasks. And that's my suggestion. If possible automate steps 5 through 9 with buttons so that the user won't need to manually do those things.

Except for that, everything else looks and works as expected.

Thanks for the suggestion. I have revised the GUI to include point selection.

Nicely done.

Thanks.