Thanks for playing and commenting, animation is definitely not my strong point but glad you liked the "static" art, hopefully my next project will have a bit more fluid movement, but it's a slow learning curve.
If you have found the bow power up (are you firing red arrows) the boss is a lot easier, though there is no end of game screen yet, so you are not missing anything by not killing them....
this was originally a Jam game, and it's still in a very incomplete state.