Great game! It has a really polished aesthetic and a solid gameplay loop between the three phases.
I liked the deduction aspect of figuring out what the customers would like, which is similar to my team's ice cream game. Regarding the limitation—other than just doing the opposite of what the boss said—I actually forgot about it as I was playing. It became more about deduction and guessing, but that seems common with this jam's limitation.
I found the pacing a bit slow during the section where you give drinks to the customers. I wanted to be able to give drinks to all three of them at once and then click on them to get feedback or hear their responses. As it stands, I had to go down the line and wait for each of them to take their sips.
The individual word typing, telling you what was in the drinks you had made, was sometimes a little slow when I just wanted a reminder of what the first drink I made was. "Okay, yeah, let's not make another sweet one," or something -- I guess the more I play, I'll start remembering the associations between the ingredients and what they provide to the drinks.
I liked the dialogue part at the end of the day and wanted a bit more.
Overall, it's really polished and nicely done.