There are hot keys for most of the diner areas, though, which helps a bit. Now that you're controlling Flo with a gamepad instead of a mouse it can be a little tricky getting her to select the right people or items. It's the same design you've probably played on PC but some precision of control has been lost in the translation. Customers will leave you tips and each level has a monetary goal that needs to be reached or else you'll have to try it again. Flo has left her corporate gig to open a diner and you'll need to help her get customers seated, get them fed, then get them out the door quickly before the people waiting in line get too upset and leave.
Is 'multitasking' one of the skills on your resume? If not, than it should be after you've spent some time with Diner Dash.