Simulator effects for Roblox: coins, pets, rebirth and level up

Simulators reward the player every few seconds: a coin, a stat, an egg, a rebirth. Each reward needs a small, satisfying burst, and the big moments (a rare pet, a rebirth) need something that fills the screen. Because the player sees hundreds of these, they should be cheap, and in a simulator most of them only matter to the player who earned them.

Rewards, pets and rebirths

Rebirth BurstPet Egg HatchCoin Magnet CollectGem ShowerTreasure ChestLevel UpLoot BeamsGold Dust Puff

• Chests and eggs: Pet Egg Hatch for a hatch that wobbles, cracks and bursts, Treasure Chest for an opening, Loot Beams for a rarity reveal.
• Level up and rebirth: Level Up around the player, and Rebirth Burst for a rebirth: a gold ring, a pillar of light and rainbow rings.
• Coins and gems: Gold Dust Puff for a single pickup (keep it small, 3 to 4 studs, with a 512 px texture), Coin Magnet Collect while coins fly to the player, Gem Shower for a big payout.

Play it when a stat goes up

Simulators keep progress in leaderstats. A LocalScript can watch the player's own stat and play an effect at the character when it changes. It runs on that player's machine only, which is what you want for personal rewards: other players are not shown everyone else's level-ups.

-- LocalScript in StarterPlayerScripts
local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Debris = game:GetService("Debris")

local player = Players.LocalPlayer
local level = player:WaitForChild("leaderstats"):WaitForChild("Level")
local template = ReplicatedStorage.Effects:WaitForChild("Level Up")

level.Changed:Connect(function()
	local root = player.Character and player.Character:FindFirstChild("HumanoidRootPart")
	if not root then return end
	local fx = template:Clone()
	fx:PivotTo(root.CFrame)
	fx.Parent = workspace
	Debris:AddItem(fx, 3) -- Lifetime 2 s + 1
end)

For a coin pickup, play the effect at the coin's position just before you remove the coin. For a rebirth that everyone should notice, fire a RemoteEvent from the server to all clients instead, as on anime VFX.

Settings for simulators

• Texture size: coins, gems and hearts are small on screen, so a 512 or 256 px texture is enough and costs a quarter or a sixteenth of the memory of 1024.
• Words in the effect: Level Up and some reward effects have English text drawn into the frames. If your game is translated, pick effects without words, or remove the text layer in the studio before you export.
• Pets: weld the effect to the pet the same way as an aura, with a small Size and a positive ZOffset so the hearts draw in front.
• Counters in the HUD: a coin flying into the score belongs in the ScreenGui, not the world. See UI effects.

The flipbook PNG is free: the ROBLOX button on every effect page needs no account, and a free account can also export it from the studio (3 effects a day) with the grid and texture size of your choice. The ready model, a .rbxmx with the emitter set up and a script that plays it, plus UIFlipbook.luau for UI, comes with any plan, from $7.99 a month.