Jacen

I was in High school in my ceramics class just waiting for class to start.
When class started, everything was the same as usual, everyone sits down and starts working on their thingy.
But then I saw a wrist band on my wrist which gave me a complete walkthrough of a game that i dont think exists.
I someone found the game inside the room and was able to play it. It started off as a 2d RPG horror game I guess.
I followed the walkthrough until i got to the very end of the game and met some people in the game.
they were all classmates in the dream in the class.
I think what happened was, what ever happened to the character in the game, they would be affected by it to.
For example, If this character in the game was cut, a dream character would also be cut.
I finally reached the final boss and i guess it would be a Martian Manhunter.
He could change forms depending on the area he is in like air, water, rock etc..
First time I faced him, he was an air type so he could go through walls I think.
I beat him and I for some reason, needed to face him again, this time, he was a rock type boss
I beat him again but when I defeated him, I needed to destroy his parts so he wouldn't be able to regenerate.
I beat him again, but this time, I decided to let everyone in the game die.
After everyone died, I beat him and got a different ending.
I was at the beach visiting graves of friends and the he came up behind me and tried to kill me.
Dodged right on time and had to fight him again. Again!?
This time he was water type, and he could appear anywhere all of a sudden.
I couldn't beat him, He got me and then I woke up.