This is a really great game! I played the demo 10 times.
The difficulty can be adjusted a little more to be more balanced, but it's a really solid game already.
Looking forward to it getting developed more. I'm interested in seeing what kind of enemies will show up later.
Depending on how long the game is, I don't think more magic needs to be added, but if it's a long game it might be something to think about later.