Wow, I'm impressed by what you delivered in such a short time and with a team of 2 ppl only!
The art is sweet and the music fits perfectly. I like the fact we're not immediately thrown into the game, but there's a skippable intro with a story first, then a tutorial. However, with further levels I found it difficult to read the tips and serve customers at the same time, as there were so many of them right away! Especially due to the waiters bugging by staying next to customers' table, not doing anything (sometimes even with the 1st customer, which at later stages was really painful). This is really the only bug I've found within the game.
BTW, if you'll develop this game after LD49, with all what's happening on the scene, maybe you could add some sfx to alert the player that sth has happened? Eg. machine is broken, food/drink is ready, customer getting impatient etc? I remember DinerDash having special sounds + animations for each event, that was really helpful to keep track of what's happening.
I also appreciate you added sound/language settings, unfortunately the sound ones weren't working when I tested them.
Congrats on making such a great game, I had a lot of fun and I hope you'll develop it further!