Loving it. Agree with the pixelization comments, although as Murdoc says, my first impression was this was a stylistic choice. It would make more sense to me that Mario would have as wrench rather than a hammer, but... Looking neat!
that looks really cool, but damn, yeah, why huge-resolution screenshots which seem to be up-scaled lowres shots? Either post highres images or leave the lowres ones at their original size, making giant pixelated images accomplishes nothing.