1) Most things, like the hammer and blueprints scroll, the dynamite boxes, backpack metal thing and even his hands\arms go through the body in most animations.
2) There is no proper portrait, although it could be easily added\created. Unanimated portraits(cameras) usually suck.
3) The texture on the wrench is really bland. Seriously, just stick with the tinker wrench texture.
4) During "Stand - 4", his hand goes through his ear and those blueprints on his back. Also the ear itself is going through the blueprints.
5) During attack - 2 his wrench goes through the head and the body.
6) His attack - 2 doesn't even looks like his attacking? It works for an enraged ogre with dual blades, yes, but not for a tiny goblin with a damn wrench.
Despite the above, this model is pretty nice although very basic and may I add, a tad simple. You could at least go more original with the hat(for example, adding some other hat or some hair or even make him bald), and obviously the weapon - you can obviously see the model is based on the tinker. Just changing some textures wont hide that fact.
Rated 2/5 - lacking, although if you manage to fix all above my rating could change.