Click to Break

Lesson 6 of 18 in Coddy's Roblox Game: Pet Simulator course.

A ClickDetector is fine for a button, but most simulators read clicks on the client, so the game can react the moment you click (a sound, a shake) before the server answers. The client's mouse knows what it clicked:

local mouse = me:GetMouse()
mouse.Button1Down:Connect(function()
	print(mouse.Target) -- the part under the click, or nil
end)

The client cannot break a pile itself: the server owns the piles and the coins. It asks, through a RemoteEvent, an object built for messages between client and server:

-- client
remotes.Hit:FireServer(pile)
-- server: Roblox adds the player who sent it, first
remotes.Hit.OnServerEvent:Connect(function(player, pile)
end)

A remote arrives a moment later, as over a network. On a phone a tap is the same click.

Challenge

Medium

In PetClient: local remotes = game.ReplicatedStorage:WaitForChild("Remotes"). On the mouse's Button1Down, if mouse.Target is a part named CoinPile, fire remotes.Hit with it.
In PetServer: local remotes = game.ReplicatedStorage.Remotes, connect remotes.Hit.OnServerEvent to call hitPile(player, pile), and remove the ClickDetector from spawnPile (and the local hitPile line: write local function hitPile under spawnPile instead).

Press Play and click a pile. Then Check.

Try it yourself

local Players = game:GetService("Players")
local ServerStorage = game:GetService("ServerStorage")
local Settings = require(game.ReplicatedStorage.Settings)

local piles = workspace.Piles
local pileSpot = {} -- each pile -> the spot it stands on

print("A Meadow pile gives " .. Settings.PileValue .. " coins")

-- Every player gets Coins on the leaderboard
Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player

	local coins = Instance.new("IntValue")
	coins.Name = "Coins"
	coins.Parent = leaderstats
end)

-- A pile's click needs hitPile, which is written below spawnPile: name it
-- here, before either
local hitPile

-- A coin pile on a spot: a copy of ServerStorage.CoinPile with its health
-- and value as attributes
local function spawnPile(spot)
	local pile = ServerStorage.CoinPile:Clone()
	pile.Position = spot.Position
	pile:SetAttribute("MaxHealth", Settings.PileHealth)
	pile:SetAttribute("Health", Settings.PileHealth)
	pile:SetAttribute("Value", Settings.PileValue)
	-- click it to hit it
	local detector = Instance.new("ClickDetector")
	detector.Parent = pile
	pileSpot[pile] = spot
	pile.Parent = piles
	detector.MouseClick:Connect(function(player)
		hitPile(player, pile)
	end)
	return pile
end

-- A hit takes 1 off a pile's health;
-- at 0 the pile breaks and pays its value
function hitPile(player, pile)
	local health = pile:GetAttribute("Health") - 1
	if health > 0 then
		pile:SetAttribute("Health", health)
		return
	end
	player.leaderstats.Coins.Value += pile:GetAttribute("Value")
	local spot = pileSpot[pile]
	pileSpot[pile] = nil
	pile:Destroy()
	-- a new pile on the same spot, a few seconds later
	task.delay(Settings.RespawnTime, spawnPile, spot)
end

-- A pile on every spot in the Meadow
for _, spot in workspace.Zones.Meadow.Spawns:GetChildren() do
	spawnPile(spot)
end