This is a 4.5-star Slitherlink puzzle. (Click the image to enlarge.)
Edit of 2011/07/22: Fixed an ambiguity.
This is what you call “abstract art puzzle”. I just go as what I want to add. Note some sub-patterns here, including two symmetrical patterns comprised of 0s, 1s, and 3s only, at quite opposite corners of the board, the box of 1s, and the triple 3210. Can you find a vertical 0123?