I love the Crazy Taxi inspiration, I’m not very good at the game (wasn’t at Crazy Taxi either), but it’s really fun to drive around and wreak havoc with no consequences too. In fact, I really wish that was even an option, but I understand it doesn’t fit with the theme. The world just feels really fun to roam around it and catch all the references, and I really like how everything is put together.
Really, the only thing that comes to mind on suggestions is things you can add rather than things I didn’t really enjoy. Perhaps another incentive to get ice cream to your destination on time would be cool, like some extra time or extra score. It was fun to mess around but just a little bit extra to get me to focus on ice cream delivery would be nice.
Other than that, great work, it was very fun!