Graphics look good. But the gameplay.. who's your target audience? It's very repetitive and will get dull quickly. But even if it was made simplistic for kids, they will be bored as well. They need a lot of variation in everything and have a short focus span.
I only saw one type of obstacle, the sharp pins, and I think two collectables (coin and can). You've got to improve on that, unless you only showed a few levels.