Simple and effective. I like it. One thing I would say is that the scrolling background was really disorienting. It made playing the game not very pleasant to the eyes and would make me quit the game even if im having fun.
You can fix this by changing the floor to something with a more neutral in color and less of a checker pattern. In addition, you can actually make the background scroll slower -- to balance this out, you can make the obstacles move faster when they appear.