Why isn't my PlayerGui working as intended?

So I wrote this script that allows a player to find/collect special coins, and when they do, the coins become semi-transparent, signifying to the player collecting that they already collected this coin and they cannot collect it again. It then adds the found coin to a coin count in a gui at the bottom left corner (It allows them to go from 1/7, 2/7...7/7 kind of like in slender when you need to collect all 7 pages). I have it set under the PlayerGui, however, everyone's gui changes with the person who collects the coins. Instead, I'd like everyone's Coin count in the gui to remain at 0 and the coins to remain opaque until the players collect the coins themselves.

Also, once a player resets, the coins collected remain transparent for all players, but the coin counter resets and goes back to 0, which is not acceptable.

• the script is in StarterGui but it is being called in PlayerGui
• the coins are meshes in the workspace

If anyone knows my problem and knows how to fix it, please do explain. Thank you.

local coinTrack1 = true
local coinTrack2 = true
local coinTrack3 = true
local coinTrack4 = true
local coinTrack5 = true
local coinTrack6 = true
local coinTrack7 = true
local coinNum = 0

player.PlayerGui.CoinTracker.Frame.TextLabel.Text = "Coins "..coinNum.."/7"
game.Workspace.RedCoin1.Touched:Connect(function(hit)
    if coinTrack1 == true then
        if hit.Parent:WaitForChild("Humanoid") then
            local player = game.Players:GetPlayerFromCharacter(hit.Parent)
            coinNum = coinNum + 1
            player.PlayerGui.CoinTracker.Frame.TextLabel.Text =  "Coins "..coinNum.."/7"
            game.Workspace.RedCoin1.Transparency = .7

            coinTrack1 = false
            return coinNum


        end
    end

end)
game.Workspace.RedCoin2.Touched:Connect(function(hit)
    if coinTrack2 == true then
        if hit.Parent:WaitForChild("Humanoid") then
            local player = game.Players:GetPlayerFromCharacter(hit.Parent)
            coinNum = coinNum + 1
            player.PlayerGui.CoinTracker.Frame.TextLabel.Text =  "Coins "..coinNum.."/7"
            game.Workspace.RedCoin2.Transparency = .7

            coinTrack2 = false
            return coinNum


        end
    end

end)
game.Workspace.RedCoin3.Touched:Connect(function(hit)
    if coinTrack3 == true then
        if hit.Parent:WaitForChild("Humanoid") then
            local player = game.Players:GetPlayerFromCharacter(hit.Parent)
            coinNum = coinNum + 1
            player.PlayerGui.CoinTracker.Frame.TextLabel.Text =  "Coins "..coinNum.."/7"
            game.Workspace.RedCoin3.Transparency = .7

            coinTrack3 = false
            return coinNum


        end
    end

end)
game.Workspace.RedCoin4.Touched:Connect(function(hit)
    if coinTrack4 == true then
        if hit.Parent:WaitForChild("Humanoid") then
            local player = game.Players:GetPlayerFromCharacter(hit.Parent)
            coinNum = coinNum + 1
            player.PlayerGui.CoinTracker.Frame.TextLabel.Text =  "Coins "..coinNum.."/7"
            game.Workspace.RedCoin4.Transparency = .7

            coinTrack4 = false
            return coinNum


        end
    end

end)
game.Workspace.RedCoin5.Touched:Connect(function(hit)
    if coinTrack5 == true then
        if hit.Parent:WaitForChild("Humanoid") then
            local player = game.Players:GetPlayerFromCharacter(hit.Parent)
            coinNum = coinNum + 1
            player.PlayerGui.CoinTracker.Frame.TextLabel.Text =  "Coins "..coinNum.."/7"
            game.Workspace.RedCoin5.Transparency = .7

            coinTrack5 = false
            return coinNum


        end
    end

end)
game.Workspace.RedCoin6.Touched:Connect(function(hit)
    if coinTrack6 == true then
        if hit.Parent:WaitForChild("Humanoid") then
            local player = game.Players:GetPlayerFromCharacter(hit.Parent)
            coinNum = coinNum + 1
            player.PlayerGui.CoinTracker.Frame.TextLabel.Text =  "Coins "..coinNum.."/7"
            game.Workspace.RedCoin6.Transparency = .7

            coinTrack6 = false
            return coinNum


        end
    end

end)
game.Workspace.RedCoin7.Touched:Connect(function(hit)
    if coinTrack7 == true then
        if hit.Parent:WaitForChild("Humanoid") then
            local player = game.Players:GetPlayerFromCharacter(hit.Parent)
            coinNum = coinNum + 1
            player.PlayerGui.CoinTracker.Frame.TextLabel.Text =  "Coins "..coinNum.."/7"
            game.Workspace.RedCoin7.Transparency = .7

            coinTrack7 = false
            return coinNum


        end
    end

end)