This was great, stealth is one of my favourite game genres!
2 things: Unless it's intentional, I found it hard to know which ingredients I should get, for me the ingredients were part of the background, I completely moved past the patty the first time I entered the room! And again, unless this was intetional, I think a white outline around the ingredients could help.
I also didn't like how a waiter's viewcone could make a 180 just like that, in one frame, when turning to walk the other direction. It felt unfair to get spotted by something you couldn't really prepare for.
But despite these two gripes, this was a great game, it felt satisfying to sneak by waiters, especially when going behind or next to them without getting spotted, the checkpoint placements were fair but still helpful and overall, the game looks great and feels great.
Fantastic work!