I think what makes Illbleed's B-movie homage so successful is this feeling of apathy that progressively builds as the game goes on. The first two stages can be pretty brutal with Stage 1 throwing you in head first and expecting you to figure out key mechanics (namely the horror monitor) on your own and Stage 2 being pretty damn stingy in regards to saves. But at some point, the friction begins to wear off. Increased access to money means it's very easy to stock up on healing items and take away the tension and the stage design doesn't increase in complexity, difficulty, etc. to make up for that. While this kind of difficulty curve where the start of the game is the hardest and later sections can't keep up with the player's access to more resources and/or greater knowledge of the game's systems aren't exactly novel (SMT and Megaman Zero are game series off the top of my head that are defined by this difficulty curve), it sticks out in Illbleed because of how much it compliments the game tonally. Stage 4 ends with an anticlimax where your character makes the boss kill itself, stage 5 initially presents a mystery surrounding a rogue employee getting killing staff (something that would be a narrative turning point in horror that takes place in this type of theme park setting) only for said mystery to conclude with no answers and to never be addressed afterwards, and stage 6 is not only the most absurd premise but actively rewards you with one of the main resources for skipping story points. Illbleed isn't just adopting the aesthetics/conventions of B-movies but rather representing the experience of delving deep into them: initially being scared when you have little experience with them, eventually becoming apathetic to them as their ability to scare wears off, and finally seeing the humor in their cheesiness.