Whats Wrong with this script?

i think you need to put quotation marks on the word SpaceHat like this.

SH = "SpaceHat"

and you need to remove the word "Head" on line 8 and it should be like this:

hit.Parent:BreakJoints()

because BreakJoints only works on Model.

the script should be like this:

SH = "SpaceHat"


script.Parent.Touched:connect(function(hit)
if  hit.Parent:FindFirstChild(SH) ~= nil then
    hit.Parent.Head.BrickColor = BrickColor.new("White")
    hit.Parent.Head.face:remove()
    hit.Parent:BreakJoints()

end
end)

i hope it helps.