Interesting concept. Reminds me a bit of VA-1 Hall-A's bartending.
I think a recipe book would make it a lot more fun to both collect/unlock but also so you're not always blindly guessing. I also found the results a bit inconsistent since sometimes the values wouldn't entirely reset. The scrolling bar for ingredients was a bit clunky. The visuals were very cozy, loved the ice cream cone in particular. Addition of soundtrack could be a significant improvement for atmosphere. There could also be a bit more of an indication of good job vs bad job or a counter, as well as some kind of end goal.
Serving customers before they arrived to the truck caused for them to stop advancing and eventually making the serve button break xD
With a bit more of work it would be supe fun, great base concept and now I really want some ice cream t-t
