Bugs
I didn't notice any that haven't already been mentioned.
Strengths
The art is really consistent. The animations such as the breathing add a really nice touch. I also like all the way you have the character's personalities on display with their appearances and dialogue. Great work!
Weaknesses
I'm not exactly sure how to start the actual gameplay.
Improvements
It's not really that important and I'm just being nit picky trying to mention something that no one else has already, but maybe research working as a professional chef if you haven't already? I'm sure grilling a steak would be easy-peasy for someone going to work at a 5 star restaurant. Research may also give you more ideas for game mechanics (: