Well this is the game's first and main moral. And a lot of people try to give their own interpretation about this, and about the entire game.

My interpretation for this is that the road represents your life. The path each of us takes in his life. Grandmother's place represents death. That's why it's so dark and it's at the end of the road. Why do you fail when you walk it? Well.. the game tells you to not walk off the path, and you listen to it. You don't take risks. You don't want to adventure. You want to just do what you're told. And because of that, nothing interesting happens to you. You don't get any experience from your life. If the begining of the path is your birth and the end of it is your death... then you did nothing in your life except what you were told.. And that's why it's a failure.

So what you need to do is break the only rule this game gives you, and stray the path into the woods. In there you find bunch of items that you collect (that will effect the ending) and the 'wolf'.

The 'wolf' is different for every girl. It looks different, and does different things, but you can always tell he's bad by the sound and visuals you get from the game.

Now what does the wolf represent in this game? Well, this is where more interpretation comes into play.

Here's mine: The wolf represent each girl's temptation. And they each fall into it. and it leads to their doom eventually. After you meet the wolf, and a few things happen, the game fades to black and you wake up in front of grandma's house, where it's rainy, dark and your character becomes weak and all depressed (You can tell by the way your character walks).

Imma give you an example of 1 of the girls so you'll understand this game better.

RUBY:
Ruby is pretty much a stereotyped goth. From all the comments she makes during the game you can tell she doesn't fit all that well with other people. She's looking for acceptance from people. She has a teddy bear with 2 heads, which probably represents how 'odd' she is. She seems to love rust and
decay and she has an odd obsession with death.

RUBY'S WOLF:
The wolf, in Ruby's case is a blond man she meets in the playground. She sits next to him on a bench and he gives her a cigarette (She said earlier in the game she wants to start smoking so it'll shorten her life).
The man in this case represents both peer pressure and temptations. Also there is a hint of a sexual act but it is again, up in the air. The game doesn't explain what happens. Game fades to black, and you wake up in grandma's place.

RUBY'S VERSION OF GRANDMOTHER'S HOUSE:
While you walk in grandmother's house, Ruby gets into a giant bird cage which crashes down to the floor and gets you in a gymnasium. In there, there's a smoking car smashed in the wall. After that there is a hall full of lockers and a room with a tire and some barrels leaking green stuff. The long hall
has some sort of machinery thingies.

At the end of the house, where grandmother's room was, there is a bed rotating on carousel. Then Ruby collapses and you see some pretty graphical images of Ruby's body. She has been murdered. Probably by the blond guy she was with.

Game Ending interpretation:
Well, in each game ending the girl ends up dead in a pretty harsh way. But do they really die?
Each girl falls into their temptation. After they fall for it, they wake up different, as if it changed them. Maybe it's not really them dieing, but it's just a process of growth? Maybe it's their childhood dieing due to a traumatic event that happend? Grandma's place represent the end of the child in them. It's death. It's end. It's removal due to an event that happend in their life.

In Ruby's case, her temptation was smoking and finding someone to accept her. She fell for both temptation, and it was her mistake that led to her death. So maybe the blond guy didn't kill her. Maybe she died in a car crash.

And what does the bird cage represents? Her desires? Her not being able to be set free?

The bed at the end which rotates on the carousel represents the playground. Her part of the childhood that was still alive in her. After the incident, that part is no more. It's gone.

Some say Grandmother's House represents each girl's own hell. Their fears, their results of their mistakes they made being shown to them. And the fact that the house is really freaky also gives that idea. But I think that this house is creepy only to represent the fear of letting go... Letting go of the childhood, of the innocence... and mature. That part of life is scary, and you do a lot of mistakes in that process.. But this is life. You learn from your mistakes, and you grow from them. And in my opinion, that's the message this game was trying to give.

At the end of this game there's a ranking system. It shows how many items you collected and how much you walked and your final grade. Well... they only way you'll get "Success" there is if you don't listen to the game's instructions... Does the game try to tell you that you can't get anywhere from doing what others tell you? Is it trying to say that the only way you'll have a success in your life is if you go have your own adventure? Experience things yourself?

There's also something weird in the ranking screen... it says Items collected 0/3... But there's like 7-15 items for each girl? And your final grade (Which goes from A to F) will never give you an A, no matter what you do.
What is the game trying to say here? That nothing can ever be perfect? That it's all about trial and error? Again, like everything else in this game, it's all up for interpretation.

Ok, so during the entire game, for all 6 girls, there is 1 girl who is dressed in white. She seems friendly to all the girls. You can hold hands and she'll lead you to places. Usually she helps you get back to the path. Other times she can help you locate interesting items. But she is clearly a real friend to the player, that tries to guide him for the right way.

Well at the epilogue after you finish the game with all 6 girls you actually get to play as the girl in the white dress. When you do, you notice she runs A LOT more faster, and she has no 'wolf'. Besides a few items to collect in the wood (That have no effect on the game what so ever so it's pretty useless to go after) there's no reason for you to walk off the path. So what you do here is actually stay on the path, and run towards the house. Usually all girls run slower so it can take like 10 minutes. With this girl it takes like 1 minute to get there.

Once you go in the house, you enter and see the area which the 1st girl you played as died at. Then she walks through a door through the area that the 2nd girl died at, and then the 3rd, and the 4th, the 5th and finally the 6th area. After that, she goes through a door that leads to grandma (The same room that each girl gets to if you get 'failure' ending). In it, there's a wolf. And by that time you notice a picture hanging above grandma with the girl in white face on there. She sits besides the bed (Doesn't get on or hug her or even touch her like the other girls did in their 'failure' endings). She just sits there besides the bed.

After that, game fades to black. Then you see the selection screen (Which seems like an apartment with industrial sounds coming from outside. The entire place is in red).
The place is empty (After each ending with a girl, you go back to the character selection screen, which is the apartment, and you see that the girl you did the playthrough with is now gone).
The girl in white comes in through the door, covered with blood. Then all 6 girls enter 1 by 1 in the opposite order you chose them, from last girl to first girl. The girl in white then walks out the door, and the game basicly starts over and let's you choose 1 of 6 characters again.

Now, let's try to figure out what this ending means, shall we?
So who is this girl in white? Well my guess is that she is the real red riding hood, but this is not her first visit. She already went through all these experiences.

She runs so fast because the game wants to aim you to go straight to the house. With any other girl you'd get bored quickly going straight through the path all the game, because for one thing they run so slow. With her, you get to grandma's house with 1 minute. So obviously here, she has no need to wonder of the woods, because she already did that mistake before. She's an experienced person who went through a lot in her life, and she knows exactly what needs to be done. She goes straight to grandma's house (In a very confident walk).

Once inside, she walks through all 6 death area of the girls you played as. Again, maybe this is to show that she went through all of these 6 events. And again, this may mean that no one really died except their childhoods. These experiences may have killed the child in the girl in white and got her to mature.

After you get to grandma, she keeps her distance from her. She doesn't get close to her, or lay next to her. Why is that? Maybe she knows she's a threat? Maybe she knows that just like the red riding hood tail, she's a wolf in disguise?

The picture above the bed with her face on it also hints that this is really the red riding hood, and she's really grandmother's nephew. Also, you can tell she's been in that area a lot, because she knows how to guide the player through the woods when you played with all 6 other characters, meaning, she's been there a lot before and she knows to ways to everything in there.

At the end of the game you see the girl covered in blood. Maybe she killed the wolf who was disguised as grandma?

After she walks in the door, all 6 girls walk in as well. Does it mean their saved? Did the girl in white saved them when she killed grandma? Why does it let you play through all 6 girls again?

Well maybe it's over analyzing now, because it's just a game and when you finish a game it's suppose to let you reply it. But maybe there's more to it as well... Maybe it just means a new person is going to go through the process of growing up. Maybe it means we all have to go through hard events in life and experience life in order to learn from the experience and mature from it.