Great work!! You are to a fantastic start with your future modeling career here on Roblox, and I am excited that you are learning. Now is a better time than ever to get started. First of all, I absolutely love the use of the bevel modifier on the “Head” of the hammer, it really gives it that touch of depth that it needs. Secondly, I can tell that you are going for a nice low-poly look, as that is very popular and in-demand right now. I touch I would add is a slight decimate modifier to triangulate the faces of the mesh, and give the illusion of more complex, yet simpler geometry. Here is an example of what I would do with it:
Other than anything mentioned above, you have an enormous potential. Everybody is always looking for a Blender Modeler, and I hope to see you applying for contracting positions very soon!
P.S. its my DevForum anniversary today ;D