Plot ideas for our 5 minute film

Following James Wan's style, we thought of going down the similar 'horror-type' style that was offered in SAW using a blue type "cold" effect-

we see a women locked in a room alone with what seems to be torturing equipment - prior to this, there's a very short indication of how she got there, a quick shot of a flyer with her face on with the text of "missing" or a newspaper article, additionally a radio voice announcing her disappearance will play to be shortly cut out by a voice of a mysterious person waking the women from her dazed moment.

The voice initiates a count down where at 0 the women will be killed via an implant placed in the side of her head.

She is faced with a task to escape the room, but these tasks arent for the faint hearted. the first task consists of a glass acid, at the bottom of the glass is a key of which will unlock her hand from the first restraint
task 2 she has to place her hand in a box/hole full of knives to retrieve a second key. The knives have just been sharpened so with every movement the cuts get deeper and more painful. this key will get both her hands finaly free allowing her to move about the room
she rushes to the door to yank it open only to be met by an electric shock on the handle forcing her back onto the floor.
she comes to task 3 as another voice from the radio prompts her, but not before she turns the radio around to realise there is no plug powering it or any batteries for that matter which sends her into a moment of freaking out before launching the radio at a wall breaking it... this doesnt stop the voice.
Task 3 forces the victim to fill a jug on a scale with a correct weight to turn the electric to the door off and release a key for her escape. A weight chart is seen above with weight values, these are - a large amount of blood, one single eye ball or a foot... which one she chooses depicts her fate.
after a manic pace around the room followed by screams and the noise of the countdown ticking she chooses and with hesitation and a shakey hand she picks up the spoon from the table next to the scale and stick the spoon into her socket forcing it out straight onto the scale.
she falls to the floor and hears the sound of the alarm shut off and the electricity stop. she pulls her self up, grabs the key and slowly walks to the door in agonising pain. She opens the door as the camera is locked to her face displaying only her reaction to the horrors beyond the door.