Hello guys! I'm making this written walkthrough, because it was requested of me, and I gladly do it! =)
Just a tip before you begin:
-IF the neighbor catches you, you will return to your house's entrance;
--Also, not only you return to your house's entrance, but also all the windows you broke will be restored
-If you throw an item to the infinity and beyond, and you don't remember where it is and you REALLY MUST have it, you have 2 options:
--1st - Start an exploration adventure to seek the lost object
--2nd - Restart the Act
With all the basics covered, we can begin.
After the intro cutscene, break one of the neighbor's first floor window (The front side ones).
Pick up something you know you can jump on and it's a bit higher than a simple box, like your bedside table, for example, and put it on the wood furniture that is near the neighbor's entrance, so you can climb to the roof:
Now that you are inside the evil neighbor's house, you can use the red/grey kinda lever
Pick up the big flower frame on the wall, next to the white door in that room, and you can actually go to the next room (Yes, there is a hole on the wall behind it and you can cross).
Use the Brown like lever on the wall, next to the white door in that room. The other items or interaction items you have there are optional, like opening the ground floor door or opening a door (why opening it with the yellow key, if you have a neat hole on the wall?)
Break the left side window, go to the roof again and jump to the platform, so you can grab the red key and use it on the locker on the door in the neighbor's living room
You are now in the neightbor's basement! This area is a little tricky, since it's based on exploration. After opening the washing machine, break one of the window's (It's a painting behind it to trick us)
After you explore and unlock the doors in the basement, return to the initial place when you first entered the basement, and you need to shut down all the eletricity so you can enter into an area and use the machine to "unlock" the exit door
You can now return to the basement entrance and turn the eletricity back on and you can now go through the bricked wall (to break it, just go against it) OR go to the door with a mannequin (The door is only opened with the eletricity on)
And that's it folks for now. If you still need more help, you can watch the walkthrough video HERE