Scratch

Really good for a one sprite one script game! I enjoyed playing it but then flew off the edge with the orange circle xD
9/10, definately a love it and favorite!

~Spine

Yeah, it was pretty fun ^^
Although, moving faster would make it better(Or smoother) but I can understand since it's only one script.
I say:Make a sequal sometime! Simple(Simple to play, I mean) games can be extremely fun, just like this one, and one script one sprite ones are amazing with how they work!(I finally decoded it, and no, I didn't go into your project and look at the code, it'd prolly take 100% CPU with my comp xD)
Maybe make one in a Square's point of view and the circle's are the bosses ^^

Again, it was really fun to play, and the scripting of one sprite one script games are almost always amazing to me ^^
~Spine

I only got to the level after you get the yellow circle, but I have to say, Nice Game!