Fun concept. At first I found the game too easy, but then I discovered the difficulty settings. Graphics were good, although a little too blurry, it's hard to tell what you're looking at sometimes.
I think the game needs just some extra mechanic to break the monotony, outside of damage dealt and hit points there isn't much difference between fighting the first rat and the final boss bear.
Perhaps a critical dodge mechanic, if you dodge very quickly you get an extra hit on the enemy. Or a witch enemy that curses you reversing your arrow inputs during the next dodge round.