I can appreciate your attempt at your first stop motion venture, and while I do find it charming in that home made fashion, I do believe that there are some critical flaws that can learned from.
The music is unfitting as it doesn't match the tone of the animation. Nor does it establish contradiction to add a sense of irony.
Blood appears on the face for seemingly no reason. The eye lids don't fully cover the eye. The sleeves are a barely distinguished color from the main body. The monster suddenly disappears, only to reappear exactly where we saw it.
Other than that, it's a fine enough project. Not great, but not bad. It's alright.