The background does not always blend well with the pictures in the foreground. I think the best fix for this would be to put some actual effort into the game.
It is often difficult to understand where I am currently in relation to where I was in the previous click. Sometimes I'll move forward then backward and I'll be somewhere else.
There is nothing to make this game interesting in any way. I would start with some more creative level design and/or by adding more elements to the gameplay. Simplicity can be a very good thing, but there is nothing much here for the simplicity to complement.
Very boring.
Btw, unless there is another way I don't know about to gain points, I am extremely surprised by how long some of these players stuck with this game.
A delightful and relaxing game. The music in particular really helped make this game. The graphics are cute, especially your use of color, but some visual variance would have made me play longer. Maybe have the sheep start going into outer space or something.
The only critique I have is about the AI. If you fling the ball at least semi-hard up against either wall, the AI will go all the way to the wall every time, thereby missing it when it bounces off the wall and travels over toward the middle of his side. I made it to about the 6th-7th AI competitor and I used this technique to dominate all of them. That is when I realized that this technique would most likely work for every AI competitor, and quit out of boredom.