I've played a fair few game like this in the past. Your version is fairly good.
Just some information:
1. The days maybe could be a little longer
2. The customers I feel take too long to be unhappy - I served 6 in the first day.
3. Some form of high score submission would be great.
Overall it's not too bad but a re-hash of many similar games. P.S Do you have a tutorial to how you made the game?
All in all very fun game. I like how it works. You should make the time limit longer, I played it a few times and could only get 2 burgers done in one day.
the customers get unhappy too fast and not so fun for me.
Fair enough. I have published a new version where they stay happier giving you a better chance.
Thanks for the feedback.