Love has some great libraries, I am still learning which is best to us in the right circumstance.
I swapped the collision library from a very physics drive one do one that is more gamey feeling, but still gives the collision detection I want.

The game controls allow the bus to move side to side, limited by the edge of the road.

When it comes to accelerating, the background speed increases and the bus moves up the screen slightly, the inverse is true when decelerating. Of course if the speed of the bus drops below 50 the game is over.

I worked on having a Display Speed, which gives the user feedback on where there are between the max speed and destruction, and a Game Movement Speed, that powers the rolling background speeds and the traffic/obstacles speeds. 

The faster you go, the quicker you can move between lanes, but the quicker the traffic will appear.