I absolutley adore this game. The animations are beautiful, the pacing intense and, wow, the character-profiles in the textboxes blowed my mind. The only thing I could think of too enhance the game would be a clearer inicator for been hit like a brief screenshake (could also disenhance the readability of the game) a sound or (my personal favorit) a short pause of the game (a few millisekunds can do wonders). If I have to get mental struggels, than my favorit way is to play this game.
Edit: I just realised that there is a sound, he just blends into the absolute chaos of music, shots and other sound effects a bullet-hell produces