Lmao, nice catch; it should definitely be A, D. The second boss fight was the last boss fight, so you didn't really miss out on much afterwards. The block/parry needed a better explanation. As for the taking of damage, there's almost always more a dev can add to making taking damage feel more impactful. I got a bit lazy this time around and omitted certain FX: a vignette to darken the screen momentarily when damaged, a red vignette when low on health, muffling of sounds momentarily when damaged, etc.
For all its faults, I still thought the game came out pretty neat. I'm glad you enjoyed the game.