OMG, 90s Nickelodeon references! I think your 90s references during the Bloopers/Deleted Scenes portion of the game are impressive. First the "I'm Too Sexy," by Right Said Fred and then you brought up Parker Lewis Can't Lose (except for that one time...)...and don't think I didn't notice how Tabitha Corbin is very close to Tabitha Soren.
Talking about a Ferris Bueller knockoff that's better than what they intended for the it's series.
So back to the game.
I would have liked a title screen that allowed me to load my progress. I had to keep pressing X till I got to the screen about Save/Load game data in order for me to get back to where I left off.
The doll code in The Haunted House confused me for a moment, so I had to consult the walkthrough...and I was even more confused until I went back into the game and noticed the slight discoloration. You might want to make the difference in color a bit more obvious as it was hard to detect. Depending on where a person is playing this and their settings, they might not be able to see the clue you left in the puzzle.
Another thing about this particular puzzle is that, logically, the code doesn't make sense. Your emphasis was clearly their age at the time of death, however you have the sisters mixed up. Even if an older sister died at a young age and you outlived her, she's still your older sister. It doesn't change just because you lived to be an older age. I'm kinda disappointed in that logic.
Other than that, it's a good try. I think the most exciting story for me was The Maniac, but only because I had to enable the Dash feature to get away from the wolf, and there was the threat of dying. The other story to give that sort of thing was likely Tyler...but that was it. Penelope and The Haunted House pretty much fell short.