I'm having a lot of fun with the game!
I think the sudden transition from a fast moving road to a static screen when a day ends or when you get a game over is what is causing people inertia sickness. Maybe having the results screen's background scroll a little too might help alleviate that?
Or maybe before a day ends the character could slow down or stop at a gas station or something, and when you game over your character slows down to a halt and gets apprehended by the cop.
Also I think additional animations of the girls moving left and right would be a really nice addition, as well as the girls bouncing when landing from a ramp jump. To keep from being too repetitive with the animations.
Looking forward to more from this game in particular!