Please add a tiny amount of natural mana regen, or add mana regen on hit to wands. If you play as a mage there is no reason to use wands because you either cast proper spells from distance, or you got rushed and need to use a melee weapon, making wands support spellcasting by regenerating mana would be great.
Also upgrading your spells makes them too expensive, I couldn't figure out how to go back to fireball lv1 so I wouldn't empty all my mana in a few casts.
Also the movement is a bit clunky, i think you should let the player cancel animations to move a bit earlier.