This game is quite impressive. I understand the game mechanic. I see the minigames will have the difficulty ramp up as the player succeeds more. Good job submitting it. And the way the customers come in and out is so smooth.
The only thing I can say is that there is inconsistency with the graphics. On one hand, there are some detailed artwork. Then, there are others that doesn't have those kind. Quite an inconsistency. What could've been better if all the graphics are either simple or detailed. The music is quite alright, but there are no sound effects. Sound effects give better polish and shows how well made the game is. If you could've add any sound effects, just by a little bit could've been better.
I like this game. Quite a solid and good game. Good luck on making your games in the future.