It looks like I forgot to save my comments, so I'm going off of memory a little bit here. I did run through it again, but I might be missing some of my initial impressions...
I was able to beat the game, and thought the idea was interesting.
- The battles feel a little frustrating, because the AI just wanders around and spams attacks and the controls are a little odd. Really, the final battle is the only one that really frustrated me, since the fire whip destroys the leaf projectiles, but I do wonder if the battle system would feel stale pretty quickly. I think a more active AI and precise battle system (at least mouse aiming) could be beneficial in the long run.
- I thought it was weird having to use the mouse in the level up menus, when the rest of the game is Keyboard only.
- The last fight highlighted that, in my opinion the MP/HP bars are way too big, they take up a huge portion of the screen, and it makes the battle feel unnecessarily constrained.
- After the mushroom battle the player character spawns back at the beginning of the map, meaning we have to walk back to where the mushroom was to pickup the axe, I think it would feel more natural to spawn where the mushroom was.
Seems like you have a pretty interesting foundation here, with quite a bit of promise!