Hey, as I am getting this is remaster of your old project.
I love different characters, but I wouldn't say that Rosemary is easier, because her special doesn't clear the screen as Lucie's and doesn't destroy the bullets. Dialogues show only Lucy no matter the character you chose.
Some times bosses brain completely turns off if you continuously hold fire button throughout the dialogue.
After looping 3-4 times the game crashed, but it saved my HS.
Right now there no music implemented into the game and the sounds are spammed a lot so even with low volume it becomes quite loud.
Good luck fellow witch-dev!