PlayingGame is not a valid member of Model?

Hey, when i run.

local funMod = require(game.ServerScriptService.FunctionModScript) local gameOver = true local gameTime = 10 local lobbySpawn = game.Workspace.LobbyModel.SpawnLocation local gameSpawn = game.Workspace.GameModel.GameSpawn

game.Players.PlayerAdded:Connect(function(player) player.CharacterAdded:Connect(function(character)

    local isPlaying = Instance.new("BoolValue", character)
    isPlaying.Name = "playingGame"
    isPlaying.Value = false

    while wait(1)do
        if gameOver then
            gameOver = funMod.WaitForGame(gameOver)
        else
            if gameTime ~= 0 then
                if character.PlayingGame.Value == false then
                    character.PlayingGame.Value = true
                    character.HumanoidRootPart.CFrame = gameSpawn.CFrame + Vector3.new(0,5,0)
                end 
                print("Game Time Remaining "..tostring(gameTime))
                gameTime = gameTime - 1
            else
                if character.PlayingGame.Value == true then
                    character.PlayingGame.Value = false
                    character.HumanoidRootPart.CFrame = lobbySpawn.CFrame + Vector3.new(0,5,0)
                end
                gameOver = true
                gameTime = 10
            end
        end
    end
end)

end)

Roblox says: PlayingGame is not a valid member of Model "Workspace.burnt_popcorn9" - Server - MainScript:19

Why is this?