will say the boss fight needs some fixes got some bugs in it plus need to at least add a save point when you enter there room right before the boss fight. fremy will sometimes not get off her poll instead she will say f you and procced to get sucked into her pole making you have to take a leap of faith right next to it and then hit in mid air and hope you get her if she does this you are screwed if you have zero healing items as you WILL plunk into the pink goop taking a health bar from you even if you do succeed in hitting her. if you get good and actually take zero damage you'll probably be fine unless her pole has vore kink and swallows her all three times. at that point I'd say grind until you have enough for the 4th health bar pill from the shop I sure didn't.
in short boss battle is broken bring plenty of healing items for the voyage into the pink goop of doom ;D
would not recommend getting for 6 bucks with the boss that has a pole with a vore kink. at least not on this version.