While it's not perfectly on the theme, it's really good for a first game ! I like the music that sets a nice vibe, i was about to comment about magic regeneration but i saw you reply it a simple "true value set to false" issue so no problem on that haha
I saw you touched a little bit of every aspect of unity game making wich is really good for a first project ! keep on going ! i really liked the exploding effect of the fire ball ! nice game