OK guys, I got mildly bad news? What was planned for the demo can not be done. I need to finish this ASAP, finish my other assignment and study for exams. So instead of the beginning of the game, the demo will contain the ending. No trailer either... There just isn't enough time. So apart from cutscenes, characters a dungeon and a boss you won't get to meet, you will still catch the ending of the game with co-op support and all weapons unlocked.
So... it'll be out Friday 13th. There will be more additions to the game when I see time, but in the last year of school, I have none.