A little basic animation - sometimes more so still images than animations, but they transition nicely! You do get a feel for the race.
Would be cool if when Sonic himself moves the background would scroll behind him too, to give the impression he is moving, and that scenes overall were more alive, like the sceneries panned or zoomed, and Sonic himself actually moved, like he does in the first bit.
Feels like you could take this further if you want, it's like a storyboard for a full animation.
Keep it up!
-cd-