Hey, it's better than I can do
I gave you 2/5 and 5/10. It IS better than I can do, especially considering I don't have Flash CS anything.
Anyway, you've obviously got motion (at least linear) and collision mechanics working. You might try adding some sound effects for your next go around, larger screen/map, smaller objects, more detail, and some special effects, like the circle shattering into pieces or pac-manning out of existence when hit.
This seem to me to have been a trial run on your part, if it's not, apologies for offending. But you've obviously got some skill, so keep it up and someday maybe you can have a frontpage.