Yep, thats it

Another fairly recent (it's old enough for GoG) indie classic which everyone must play.

That looks like a cross between Bridge Builder and Marble Madness :-o Never seen it before, probably never heard of it either.
And yes, it was of course Alpha Centauri :-)

Perhaps with a touch of The Incredible Machine as well

Yeah, that too.

Yeah, it's basically Bridge Builder + The Incredible Machine. There's a built in level editor too, which I used to make these experiments. Rocket-powered vehicles ftw. :)

the incredible bridge builder machine on the lttle big planet?

A bit of research netted me the title Armadillo Run. I was right, I've never heard of it.

Correct. So now you've got some extra research to do tonight, then. There's a demo. :)
http://www.armadillorun.com/

Alright. I suppose we've all at some point been frustrated by this? An absolute classic!

LOL, too easy. I'll let someone else answer. :)
Btw, I believe the original creators own the copyright to that one, and are still around. So it shouldn't be impossible to get on GoG.

Well, someone answer! ;-)

I don't know what that log is, but the mouse cursor reminds me of the old Simcity. Which I doubt it is by the way.

Its unnecessary, but im confirming that my game was in fact Breach 3.