thank you so much for such nice review!
i am sorry about the bug, i will try to do something about it, but firstly i have to reproduce it to know what is wrong, which so far i didn't manage.....
If it helps, I was using Google Chrome Version 89.0.4389.90 (64bit) Played the game in Fullscreen mode as well.
Update: Looks like I'm able to put that piece in fine when I'm not in Fullscreen mode. (So might have something to do with that)
ok, thanks for details!