This was really impressive, you are clearly very talented. Aesthetics were gorgeous. I would often embrace chaos on the timed attempt and then choose the no-timer option because I found it so satisfying to take my time.
I think the one feedback comment I would give is I echo what someone else mentioned in the comments in terms of saving the rotation of your last placed object, or maybe a 900-degree snap rotation toggle or something. But that's very very minor, you have gone above and beyond with this!