Well honestly, going into this game, I expected there to be an actual "end" to the game. I understand that you are going for a "corrupted Pacman ROM" feel, but let's face it, you threw that out the window when you started having the little pacman life icons have devil horns on them.
No, I think you should take this possessed ROM thing one step further, and make it a full on simulation of the game trying to steal your soul. You could add subtle little hints in that something is far less right than normal, such as the ROM doing things that its hardware wouldn't even support. You've already done that by having the random screaming sometimes and such, but you can even do a less rare thing such as the ghosts whispering demonically when they are near every now and then instead of emitting static. When people expect something because they have gotten used to it, they notice little unsettling changes like that.
Perhaps the "lives" in the game no longer mean anything after a certain point, perhaps the entire original game concept and goal fades away after 6-7 levels in, and it changes altogether. You still control Pacman, there are still ghosts, but the map starts directing you towards certain death, and you have to reach the only pellet at the end to move on.
These are all just very loose thoughts, and nothing more, but the overarching thing I am getting at is, you are really constricting yourself too much by sticking so strictly to being just a Pacman fangame. It works at the start, but there's just so much more that can be done here as the game progresses. Strange as it may be sound, I'd almost recommend you create a second game based around the concept of a Pacman like game that morphs more and more into a a 4th wall breaking experience of you fighting against the machine itself for your soul. Not the soul of the character mind you, but the soul of the one playing the character.
I like these thoughts very much.
Developer
