First of all, welcome.
These are just some random thoughts I had during the read. It will be interesting to see how you translate it to the screen.
The power is out, yet the oven clock is still on? At first I thought, sure. It could be analog. But then later in the script, it reads 5:35 then changes to 5:36. Okay, that's digital. My digital clocks all go black during power outages.
Was he dreaming? It stayed 5:00 for 3/4 of the script. Again, I thought of analog clocks that just stopped until the visual of the time change. Did time stop?
"Very dark" won't give you much light to actually capture images in your camera. Maybe give him a light source early on to use as motivation for the light in the scenes?
I gather this is a form of tag that friends are playing with one another, hence "Scapegoat" or "Escape from the Goat"? But you seem to imply that real weapons are in play. If I were watching this play out on screen, I don't know that I would have any sense of danger or forboding because this seems like a sequence from many slasher films except in your script there's no foreshadowing of a real threat to one's life. A boiling rabbit or a bloody axe or a neighborhood cat pinned to a tree with a butcher knife.... I mean, I see a guy down the street coming slowly with an axe, and I have access to a shotgun, no contest. Axe guy loses.
At the end, was that a deja vu moment ala
Groundhog Day? The news picks up exactly where it left off some 35 minutes ago... And then it's 5:00 again.
Very abstract the way it's written.
Incidentally, I'll leave format alone since you're planning to shoot it yourself, so it doesn't matter (unless you're looking for that feedback, too). But I will say that the over use of "Moments Later" and "Cut to" was distracting to me.
I've spent some time recently studying Blake Snyder's books, and your story would fit into the "Monster In the House" genre. For this to work, there are some important elements:
1. A "monster," supernatural in its powers - even if its strength derives from insanity - and "evil" at its core.
2. A "house," meaning an enclosed space that can include a family unit, and entire town or "the world".
3. A "sin". Someone is guilty of bringing the monster in the house... a transgression that can include ignorance.
There are other import elements, including the "Half Man", someone who has encountered the monster before and survived. This character does well to establish the threat and possibly help the hero figure out how to kill it.
So you have your monster, and you have your house, and you did well to describe the claustrophobic feeling of some of the sets in your "house" as well as established it being closed off for the most part (snowed in). But the absence of establishing the real threat and establishing a "likable" character that we (the audience) actually worries about and wants to root for hurts the story, IMO. Your hero needs a
"Save the Cat!" moment and your monster needs to boil the family pet, so to speak.