Just Like 7tq said, attacking should be faster, but other than that, it's a decent idea with okay implementation.
You should use better control though. Instead of rmb or lmb to attack, use keyboard button, cuz remember, not all people are using a mouse (touch pads are getting very popular).
Art: 7.5/10. A bit TOO pixelated for my liking, but still good.
Music: 8/10. Not fitting for the game, but that's just an opinion.
Code n Implementation: 8.5/10. Collision are kinda sloppy and the controls are kinda annoying.
Theme: 7.5/10. Didn't particularly notice it when starting the game, but it's a neat idea.
Now, by chance, could you play our game? We're looking for as much feedback as possible. I already got a lot of feedback, so if you're not free, you can just not play it. But any feedback is appreciated!
Good game + keeeeep it up!