is this a good film idea?

ackground: Rachels mum was killed by her father when Rachel was just a
baby. Rachel now lives with her aunt and uncle. She blames them for
her dad going to a mental institute. Kurva is a dumb blonde whos dad
left her mum and her mum is now with another man. Mike is Kurvas
boyfriend. Jad is Rachels boyfriend. Cole is the cool, geeky type.

The beginning is a bit of a cliche....
the group decide to go camping in a clearng at the woods. they decide
to meet at Coles house.
Kurva gets kidnaped by Rachels estranged dad who escaped. (in the film
you do find out what the dad looks like and that he has escaped before
this scene). David, Rachels dad, gets Kurvas pone and texts the group
telling them she will meet them at the clearing.
At the clearing, Kurva still isn't there. they get another text saying
that she's not gonna go. During the night, Jad wakes up to go to the
toilet and sees Rachel, Mike, Cole and Kurva unconcious on the floor.
David hits Jad around he head with a baseball head making him also
unconcious.
When the group wake up, they are in a cinema multiplex.
A note is on the wall infront of them saying: "we're going to play a
game. walk around and have fun."
The untie themselves and walk around.
They somehow get split up.

Order of death:
Mike, Cole, Jad.

Kurva and Rachel meet eachother in the room they woke up in. David is
there too.
The twist that gets explained at the end is...
Rachels Mum (Pam) slept with Kurvas dad and got pregnant. So David
found out and Killed Pam. He said that the anger drove him insane. He
pulls out a knife and holds it to his throat but decides to kill
Rachel instead. He then turns to Kurva and smiles insanely. It ends
with David holding up his knife and Kurva letting out a blood
curdeling screaaaaam.

remember, some of the things that happen in the cinema will be quite
creepy. like the room Cole is in - all of the lights go out - all he
can hear is scratching, breathing and footsteps.

its not gonna be gore and "you're trapped now you die," some stuff is
gonna mess with the peoples heads.
and remember it will be alot scarier with lighting, sound effects ect.

ideas? suggestions? plot holes? thanks -x-