For loop ieterating through players broken. Could someone explain?

I've inserted a value into each player that joins the game called, "player" but this script isn't working.

--Made by Aceta

players = game.Players:GetPlayers()

function getPlayers()
    for i, v in pairs(#players) do
        if v.play.Value == false then
            Instance.new('Message', Workspace).Text = 'yay we can start'
        end
    end
end