Why is my IntValue resetting when the game is exited?

My game has an IntValue that is meant to be used for save and load, but instead it resets to the saved value on game exit: Example: I use DataStore Editor to set my value to 50. Then I play the game and set my value to 55 (with explorer not DataStore Editor). Then I leave and test again. My IntValue is back at 50. Why is this happening? Code:

local DataStoreService = game:GetService("DataStoreService")
local dataStore = DataStoreService:GetDataStore("DAT")

game.Players.PlayerAdded:Connect(function(player)
    local coins = Instance.new("IntValue")
    coins.Name = "coins"
    coins.Parent = player

    local playerUserId = "Player_"..player.UserId
    print(playerUserId)
    local data1
    local success, err = pcall(function()
        data1 = dataStore:GetAsync(playerUserId)
    end)
    print(data1)
    player.coins.Value = data1

    if success then
        print("Load success!")
        game.StarterGui.ScreenGui.TextButton.Text = player.coins.Value
    else
        warn(err)
    end
    print(player.coins.Value)
end)

game.Players.PlayerRemoving:Connect(function(player)
    print(player.coins.Value)
    local success, err = pcall(function()
        local playerUserId = "Player_"..player.UserId
        print(playerUserId)
        dataStore:SetAsync(playerUserId, player.coins.Value)
    end)

    if success then
        print("Save success!")
    else
        warn(err)
    end
end)

game:BindToClose(function()
    wait(5)
end)