Good game! I managed to get a rating of 124 with 25 biscuits, and I managed to get one biscuit with a taste score of 31 just by adding the same ingredient repeatedly lol.
I'm not sure if this is intended behavior or not, but when I finished a biscuit with a low but positive taste score (such as 1 or 2), the customer said the biscuit was "pretty gross", which I personally would only expect to see when I finish a biscuit with a negative taste score, but I may be interpreting it wrong.
I would suggest adding a sound effect or visual in the middle of the screen indicating when you are running low on time, so you know to hurry up, but overall, it was fun! And great for your first game jam!