I like the concept, it could have definitely been improved on but like the description says, it is unfinished -- so I will only remark on what's already there..!
The gameplay is very much there -- I did have to stop for a second to read the description and realize that the metal orbs were attacks though, but the design overall was interesting and cohesive!. After defeating the boss, I didn't really know what else to do. Again, it's a really cool concept; I wish there was a bit more to it! Good job!