Solid game, clear instructions, and awesome pixel art! The customers bobbing up and down are really cute. In the description, did you mean to write "warning: customers don't have patience"? Haha!
I'm able to see the game perfectly despite what a few other reviews said about zoom -- maybe it's a browser issue? I'm using Chrome on a Mac, if that helps. All of the buttons are in the viewport, and I can see customers fine.
This is pretty fun!