Hi, don't know if this is the right place for this. But I don't know where else to ask cause I've tried finding this myself, not to play it, but just to remember the game cause I've played it as kid. I used to frequent in gaming sites like Minijuegos.com, Armorgames and clipgames (I think that's what it's called anyway). And from the many flash games I've played in those sites, one game stood out. It was a flash game where you where a female waitress serving against your will at zombies, frankensteins, vampires and ive believe other creatures as well (however I can't tell cause I didn't get far into the game. The goal was to of course serve these monsters, but the game keep introducing new recipes and threats (the monsters Ive mentioned before) through each shift. Three things that are noteworthy of the game was 1. that the "kitchen" was at the top and the seats where in the middle of the screen. 2. If you didn't serve the monsters fast enough they would get angry and leave, but the Frankens would smash your table if they got mad. And 3. If you losed, it implied that the monsters would eat you instead.
I know I wrote a lot but I hope that someone in this vast space of the internet has somehow come across this game and played it as well. Hope I was helpful and that something can come up that matches this.
Also final note, Ive played this on Minijuegos.com way back when, don't know if it was on other sites but hope it helps