Very neat concept, but execution wasn't great.
Waiting 30 seconds each time without an option to skip the day wasn't fun, especially when the same jingle loops every 8 seconds, it got very old very quickly.
At least once the new music was acquired with the store upgrade it got a bit more bearable, especially since at that moment, more customers would run around the store, and it would feel nice seeing the progress made.
This concept has potential for a very neat game with better execution and polish.
Great job on your game!