Roblox Tower Battles exploit

[ALL CREDITS TO THE OWNER, I DID NOT MAKE THIS SCRIPT]
https://v3rmillion.net/showthread.php?tid=358518&page=1
For those that don't have V3rmillion:

Credits:
CreditsToGive = 3000
workspace.Give:InvokeServer('Credits',CreditsToGive)

Free Upgrades:
local ws = workspace
local plr = game:GetService('Players').LocalPlayer
for i,v in pairs(ws.Towers:GetChildren()) do
if v.Owner.Value == plr and v.Tower.UP1.Value < 4 then
repeat
workspace.HasEnough:InvokeServer('Cash',0)
workspace.Spend:InvokeServer(0)
workspace.UpgradeTower:InvokeServer(v.Name,0)
until v.Tower.UP1.Value >= 4
end
end

Zombie Spawn:
local ws = workspace
local plr = game:GetService('Players').LocalPlayer
local uts = 'Boss2' --Don't spell it wrong. This is the enemy that you want to send.
-- The boss names are Boss1, Boss2, and Boss3
local ns = 20 --How many of that enemy you want to send
local cd = 0 --cooldown between each enemy spawn. not many people would want to change this.
for i=1,ns do
workspace.HasEnough:InvokeServer('Cash',0)
workspace.Spend:InvokeServer(0)
workspace.Make:InvokeServer(uts,1,cd)
end