I love the look and presentation (perfect aspect ratio for this type of game!), and the gameplay is really approaching a great sweet spot of challenging and frustrating enough to make you want to keep trying at some of the more difficult parts.
One small thing that I noticed right away in the first level, though, is that some of the obstacles can be a little hard to pick out from the background, or to differentiate from similar-looking non-obstacles. Specifically I'm thinking of horizontal light posts, clotheslines, and flag poles. Great job all around, though!