I really liked the slick pseudo-3D graphics! Combined with the cool retro-inspired music and sound effects, this game really reminded me of classic SNES and arcade titles, like F-Zero and Cruis'n USA.
If you decide to continue developing this project, I think it would be cool if the obstacles (cars, houses, billboards, oil slicks, etc.) spawned at the horizon line. I think it would really help with the illusion of a 3D environment.
Regardless, this was a really impressive game jam project! Great job all around! :)