Feels really polished! Insane that you were able to finish this within 4 hours of the game jam :) My one and only point of criticism would be that the theme could have been more deeply incorporated but that is a very minor complaint. Overall the game is great!
Viewing post in Smoothie Tycoon jam comments
I think the existing mechanics function really well so I'd just expand upon them: more recipes, more things you can buy, more items a.s.o.
A feature which would be nice is to be able to "auto fill" a recipe if you have made it before, would reduce the amount of time spent drag & dropping ingredients back and forth.