Hey thanks for playing! Great to hear the ending got you lol we live for that. I like your suggestion with the sword, I do think the boss melee attacks ended up being super punishing and that would be a good way to make them more fair.
With regard to the secret cannon ball, you may be the only person to my knowledge who's discovered that. That's our little developer cheat for instakilling the boss ship, it does like 999999 damage I think.
Anyway, glad you enjoyed! And huge thanks for the feedback.