Alright, solved it without using the safety escape route and by using all the other aforementioned elements :-)

Solved it without using the floor button (entrance area) or the wall button (second cube area). Solved it without cube throwing or angled lasers through portals :D
Used the distant safety signage (at the death fizzler) for solving.
Can be solved without using the portal surface in the entrance area.
Other than that good logic and nice visuals, which unfortunately make the coloured cubes hard to distinguish. More to come in a week, when a teeny tiny video will hit up on YouTube... ;-)

Apologies that one must have benn covered up by a fix. Deactivating the laser relay near the the laser starting area deactivates square.

Hello! I am unsure where the Square signage input is at.

Thanks :) you can thank calimero for the idea
He gave me the subtle advice of trying to bring both cubes into the laser area and i created the last move beased on his advice.
I am happy you still enjoyed playing it a second time.

That's an ending move I didn't see or use in the previous version. I was close though.
The ledge by the funnel is appreciated. Cheers.