The idea behind this is really cool, I like the mechanic of both attacking enemies or building blocks with your hammer. Think this suffered a little bit from colliders, I found it too easy to get killed by the enemy even though they weren't near enough to hit me and I swung my hammer at them. You could easily do a lot with this concept if you continue working on it, and it would be great to give the hammer attack some more game feel (i.e. camera shake, particle effect) to really polish it out.