I feel like a stats tracker would be great to add a mission to the game. Just something to look at that shows how much you've done. It might have total packages delivered, distance traveled, closest packages, furthest packages, fastest deliveries. Also, I think the boost was a great addition to reward deliveries but maybe some sort of currency to spend on certain upgrades, like a line that shows you the fastest way to the country, or a marker that shows exactly where the city is(unless this makes the game too close to a tycoon game which might not be what you want). Overall a great game and is definitely gonna be even greater