is there a script where you click on a spot on screen and your player goes to it and avoids objects with a certain propety?
no
for several reasons
there is no way to tell the 3d coordinates of a click, so you would need an in-game cursor which you can have a ray sensor point at [but pass through]
because you would quickly find that walking directly towards the destination and turning when encountering an obstace isn’t good enough.
and I guess because there is little demand for it and most people here are too lazy to finnish something relatively complex
[myself included]