You know, I like the concept and the style of this show, but they failed to handle it.
Plot: Rudy, a boy who discovered a chalk, well, a magical chalk that can go to the dimension made by chalk drawings! Along with his friend Penny, and Snap from the chalk world, they discover more things. While Snap is sort-of discovering the human world. You know, this is a great plot actually, but they left it out in the dark, and dragged themselves to the dirt, made everything too pointless, too bland and boring.
Characters: Way too boring and simple. We got a typical bully and strict teacher. Their concepts should be more complex.
Humor: They got no good jokes, not annoying, but bad. They got bad, boring jokes.
Art: The art is fine, could use a little more coloring touch, animation is too stiff.
Overall: 2.5. I saw a lot of potential to this show, but they really don't know how to use it!