I really like the concept, the music and the characters were awesome! Getting into the game felt super natural, the tutorial was clean. I knew exactly what needed to do once the game started. Also I was really digging the art, something about the design of the characters, felt nostalgic..
Honestly i dont really know if im the kind of person to be giving notes likes these but some things id add or consider if you plan on continuing the project (i really do think you should):
- slow down the A/C maybe? I was starting to feel the heat irl clicking so much
- randomise the order of the drinks
- Not sure if it was endless or i just wasn't good enough to get further, but if its endless id have a score instead of the stars. every correctly served customer is xx points. Or a score based on the speed you serve a customer?
- customers ask for mixed drinks late game, like a half and half spirte or something to represent it