I like the style of the game and premise is interesting. I'm not sure if it's the web build of the game but it felt like there was significant delay from the time I stopped holding the pour button until it actually stopped pouring. Customers also ordered different drinks but I couldn't figure out how to switch between the drinks, which I think are represented on the bottom of the screen, I tried clicking, arrow buttons and WASD but they didn't seem to do anything. I also managed to find a bug, at one point one of the customers just stayed on the screen even tho other customers kept coming.
It's got some rough spots but the general vibe and idea behind the game is quite cool I think. With some slight improvements it could be pretty good. Good job on what you've accomplished as well! :)