Holy addictive premise, Batman! This game is wonderful! It manages to incorporate strategy and planning (the menu), skilled action (cooking), and a wonderful upgrade system all in one great package. This has seriously set a gold standard for manager/sim games of its kind.
Now even though Ive given it a 5-star review - it still has room for improvement. I play it on an iPhone 6+ and the graphics feel somehow fuzzy - Ive seen it on lower res screens and it generally looks fine so I suspect a slight scaling issue. The interface is also very spread out on the 6+ so your fingers are going to get quite a workout bouncing around the screen.
Theres no reason not to try this excellent game! Did I mention it has save slots so you can have several different saves at once? How awesome and unusual for a mobile game! Seriously free trial version - get it. Do it now!