Erm... I'm assuming this is coding practice... so I guess that's not so bad? Gotta start somewhere, right?
But as a standalone project, it really does need more substance. If you're aiming for "simple move the sword and slash things up kinda game", then have things like sound effects for when you move and when a target is hit, or targets that move around and are animated. It's a nice start that the designs are unique, but they need to do more than just sit around.
... and as with almost every other commentor before me, this kind of song really doesn't work with this kind of game... I'm sorry.
You're still improving, so just keep at it! I think you're headed in the right direction.