If you don't know how to exit, click the windows button (that will bring up the taskbar), hover over the unity logo, and click the "x" button. :)
EDIT: Gave up here trying to make a base
RIP basee
yeah
i already figured out on how to exit. first i pressed f1. second i did your method.
nice
unfinished base. didnt even build the 4th corner. sad.😪
or it could be alt f4 to exit the gam