Thank you for the feedback ! I did make a feature where every time you die on the Boss, the boss has a little bit less HP, cause I know that for a gamejam game, people will give up quickly if the game is too hard, meanwhile other people found the Boss too easy, so I felt it would make a good balance. But I think my values were not extreme enough (I didnt want the player to find out and feel like they didnt heard the win). Right now the Boss has 39 HP, meaning requires 39 hits and every time the player dies, the Boss has 2 HP less, to a minimum of 12 HP if dying again and again, which is probably not quick enough to give hope to people how thinks the boss is too hard, probably losing 4 or 5 HP would've been a better balance.
Thanks for the feedback and thank you for playing !