The game starts right after you return to your home town. Nobody is waiting there for you, so you can see the platform and go to the exit. The door is blocked by the maintenance worker and he does not want to let you through, because the platform is still inaccessible.
You will be allowed through only after you bring him a soda from the vending machine (you first have to talk to him a specific number of times). Approach the machine at the other end of the room and click on it . You will receive the soda and will be able to give it to the man. He will let you through.
Now, you will have to go to the other end of the location. Your character will point out that the shortest way home is through the woods. This makes the next location.
After you jump down, climb onto the darkest branch at the other end and jump on it until it snaps. Do that using the Space bar (default for jumping). Thanks to this, you will be able to move on.
Now you will get near a kid ship. To be able to continue, you have to jump onto the tree. For that, jump onto the tree trunk with number 2 on it, then onto number 3 and finally onto the tree. You will have to do that rhythmically, or Mae will be unable to jump high enough. From the tree, jump onto the tower on the ship, and over the electric line towards the end of the location.
You will get into a room, where you should go to your room, after a short conversation with the father. To climb the stairs, you have to jump onto it first. Your room is at the top floor. After you enter it, interact with the bed to continue.
In the morning, come down and talk to the mother before you leave.