Nice work! Overall super well done, especially for a first jam. Here's my feedback (please take it constructively)
What worked well:
Very cozy, outside ambiance, tunes, and the customer mumble made it a very relaxing experience.
Tip system rewarding speed added much needed depth.
Rolling muffins across the counter is way too satisfying.
What could be improved:
Needed an extra layer of gameplay depth in my opinion, it felt quite one-dimensional.
Some UI bugs and inconsistency, average Unity UI experience.