The different array of customers (and returning customers) itself should grant a pat on the back for this developer - from cheesy 'pun' guy, to a woman who can also see the spectral shenanigans, you'll be swept up in the unfolding drama (as well as making sure you don't burn your burgers.)
At first I thought the 'smoke ghost' was a little goofy, but on one of the 'appearances' it did actually make me jump. And I consider myself someone that doesn't jump that much. So congrats on that.
The ending was a little abrupt and ambiguous - I generally wanted to experience more of this little kiosk and find the mysteries behind it . Did we ever get to find out what happened to the last guy that worked there? Did he explode?
And remember kids...don't drink and drive.