It really has this vibe of what early browser games had. Simple but enjoyable:)
I appreciate that you can play the game using only keyboard - games often rely too much on the mouse and it can be annoying sometimes. I also liked the catch that you need to remember to collect the money before they leave!
As for feedback, I am not familiar with those dishes names so it would be nice to have their names written down below them or something like that. One more thing you could do is to have some kind of progression where you unlock new dish types for money - I believe that could make it quite engaging!
Overall, fun and simple game:D