The left and right controls are responsive, and the graphics work very well together, however the cars should spawn high enough to appear to come from off screen, instead of the middle of the road. Also, the spawning cars stopped moving upon reaching 3700 travelled, I'm guessing this is you winning but there is no confirmation. If your Health runs out, the cars also stop, but you can still move into the car and make your Health go negative. Some suggestions would be to add a win or game over message when reaching either state, and stopping player controls once that happens. Also, the trees on the side and the line in the middle should also move down to give the impression of movement, right now it looks like the player car is stationary.