You wanted comments, so here goes...
I see some have reported on the black background-color. I have that too, not in the front window, but when you select an item to select size and/or color.

AND I think it looks a bit messy having both the bar-menu (Home-ikon, Men, Women, etc)
and having the same menu down the side of the window/screen. Better to have one or the other, but maybe there will be an option in setting up the store??

BUT having the different colors show underneath each t-shirt is very nice, love that. And I guess there will be some changes in the options in setting up the store that I will welcome very much.

Keep up the good work!