The puzzles themselves are challenging and fun, requiring a different set of logic and thinking than other puzzle games.
The only thing keeping this game from getting five stars, though, is the execution. In a previous review I complained about the zoom feature, noting that it doesnt always recognize zoom gestures have been made. This problem has been fixed, but it still doesnt let you zoom in as close as youd like, and its also still far too easy to tap a segment you didnt intend.
It would be nice to have something not unlike what exists in the Fill-a-Pix game where, if a box is marked with a 1 and you know which one side is filled in, that a tap would automatically mark the other three sides as not filled.
Mudak326 about Slitherlink: Loop the Snake