I like the low poly art style and there was quite a bit of visual polish, but the game started to feel repetitive fast. I think it would be better if there were more enemies and if the enemies did more than just come towards you. Also I don't really know why sometimes the magic circle would fill up quickly and sometimes it would take a long time. I think I was supposed to be standing inside it while fighting?
The other thing I noticed is that the game seemed to freeze a frame every time I hit an enemy. Maybe this was some sort of hitstop effect, but it made the whole thing feel quite laggy.