Cracking the Case-An Inanimate Insanity Fanfiction

Chapter 1 that I don't have a name for

Apple quickly yanked Marshmallow by the hand and skipped innocently across the purgatory mansion with a smile brighter than the sun.
"Marshmallow!" the gleaming, crimson red fruit joyfully gleed in excitement, "Come on, I need to show you something!"
"Huh?" Marshamallow replied in shock, scratching her head with the hand that was currently not being held, "Sorry, I didn't quite catch that-"
"It's fine! Just look at what I found!" Apple said after she had stopped pacing across the mansion, which almost caused Marshmallow to fall and faceplant onto the dark, wooden floorboards.

In front of them was a... mysterious purple door of some sort that had been boarded up.
"Since when was that there?" Marshmallow asked in curiosity, pointing to the strange door, "We should ask Bow, she's been living here for years, and if anyone should know, it's her."

"What are years?" Apple asked before Marshmallow started dashing across the hallway, leaving her behind, "Hey! Wait up!"

"Uh, yeah, no hun," Bow replied, "you are SO not allowed to go in there. That door gives off REALLY bad vibes and you shouldn't go near it, like, AT ALL. End of story."

"This one time, I touched it, then all of a sudden I was super hungry, and that is the WORST feeling ever if you ask me," Dough told the dead pink headgear, the idiot who needs a dictionary and the squishy confectionary with trust issues.
"Seriously, where did this guy come from and why does he think he's my brother?" Bow quietly whispered to Marshmallow in confusion before she just replied with shrugging her shoulders.

  Eventually, the moon rose while the sun sank as the dark colour of the sky and the blinding white stars became more visible.

"I can't sleep Marshmallow! What about you?" Apple whispered to Marshmallow so Bow and Dough could sleep peacefully. Bow said that she needed her "beauty rest" so that she wouldn't wake up with a grumpy attitude and dark circles around her eyes, but Dough was just straight-up lazy.
"Yeah, me too," Marshmallow replied, trying to be as quiet as possible, "it's just something about that door that creeps me out. I wanna know what's behind it..."
"Oh, I just couldn't sleep because I forgot what the sponge guy from Spongebob Squarepants is called," Apple said, "it's a good show, really, you should watch it someday. In the first episode, basically what happens is that-"
"Alright, that's enough talking, do you want to come with me to see what's behind that door or not?" Marshmallow asked, throwing off her blanket and slowly stepping out of bed.
"Oh, sure!" Apple answered happily, jumping off of her bed, "But before we go, what does behind mean?" Marshmallow stared at Apple in disappointment awkwardly. "Ok, ok, I won't ask again... let's just go."

"Sheesh, I almost forgot how ominous this door is," Marshmallow said, shutting Apple up as she was about to speak, "and before you ask, it means creepy and sinister."
"Ok then," Apple responded, "I'm ready to go in, but it's all boarded up..."
"That's fine, let's just find something to break it down, like a hammer... or an axe," Marshmallow explained, tapping her chin, "but Bow hates  violence. She's paranoid that if she sees something that can be used as a weapon, she might go crazy again, which is why she never allows those kind of stuff in the mansion."
  "Well that's bad," Apple sadly replied, playing with her fingers, "how are we supposed to see what's behind that door now?"
  "Well, I think I know someone who can help..." Marshmallow said, thinking of an idea.