Extreme Nago is a good example of a boss fight done just like a fetus in the womb would. Someone just kicked the keyboard a bunch of times, called it a day and published the game like that. I don't even want to reach stage 9, that'll be even worse.
Ignoring that trainwreck of a fight, the fact that the balance is a shit-storm, the game has likeable characters (most of them, at least), a fun story, perfect graphics and a OST full of bangers. I can say that I enjoy it overall.
Edit: Jack-o' :)
Edit 2: Bridget :(