The 'Scratch' attack option is clearly put there as a last resort when there's no better way to spend your Energy, but it's nigh useless as is. It would be more interesting if there were ways to ramp up its damage, for example a permanent +1 bonus everytime you increase your max HP by 5.
Magic in general is OP given how mana stones recover all charges at the end of combat. It would be more balanced if you only recovered a fixed amount of 1 or 2 charges, maybe more with the help of items or a relic.
Asides from these nitpicks, this game is looking really promising so far.