Upgrade System

-- Paste as a Script inside an upgrade button.

local Players = game:GetService("Players")

local BASE_PRICE = 50
local GROWTH = 1.6

local button = script.Parent
if not button or not button:IsA("BasePart") then
	return
end

local busy: { [Player]: boolean } = {}

local function getCash(player: Player): IntValue?
	local leaderstats = player:FindFirstChild("leaderstats")
	local cash = leaderstats and leaderstats:FindFirstChild("Cash")
	if cash and cash:IsA("IntValue") then
		return cash
	end
	return nil
end

button.Touched:Connect(function(hit)
	local player = Players:GetPlayerFromCharacter(hit.Parent)
	if not player or busy[player] then
		return
	end

	local cash = getCash(player)
	if not cash then
		return
	end

	local level = player:GetAttribute("UpgradeLevel") or 0
	local price = math.floor(BASE_PRICE * (GROWTH ^ level))
	if cash.Value < price then
		return
	end

	busy[player] = true
	cash.Value -= price
	player:SetAttribute("UpgradeLevel", level + 1)
	task.delay(0.4, function()
		busy[player] = nil
	end)
end)