Roblox Script Generated by ScripterAI

"create a level system with xp with data store that changes players health and players weapon damage will increase as player levels up"

-- main script (ServerScriptService) 
local DataStoreService = game:GetService("DataStoreService")
local levelDataStore = DataStoreService:GetDataStore("LevelData")
local xpDataStore = DataStoreService:GetDataStore("XPData")

local function onPlayerAdded(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player

local level = Instance.new("IntValue")
    level.Name = "Level"
    level.Value = 1
    level.Parent = leaderstats

local xp = Instance.new("IntValue")
    xp.Name = "XP"
    xp.Value = 0
    xp.Parent = leaderstats

local data
    local success, err = pcall(function()
        data = levelDataStore:GetAsync(player.UserId .. "-Level")
    end)

if success and data then
        level.Value = data
    end

success, err = pcall(function()
        data = xpDataStore:GetAsync(player.UserId .. "-XP")
    end)

if success and data then
        xp.Value = data
    end
end

local function onPlayerRemoving(player)
    local success, err = pcall(function()
        levelDataStore:SetAsync(player.UserId .. "-Level", player.leaderstats.Level.Value)
    end)

success, err = pcall(function()
        xpDataStore:SetAsync(player.UserId .. "-XP", player.leaderstats.XP.Value)
    end)
end

game.Players.PlayerAdded:Connect(onPlayerAdded)
game.Players.PlayerRemoving:Connect(onPlayerRemoving)

-- script for increasing player health and weapon damage (ServerScriptService) 
local function updateStats(player)
    local level = player.leaderstats.Level.Value
    player.Character.Humanoid.MaxHealth = 100 + (level * 10)
    player.Character.Humanoid.Health = player.Character.Humanoid.MaxHealth

local weaponDamage = player.Backpack:FindFirstChild("Weapon")
    if weaponDamage then
        weaponDamage.Damage.Value = 10 + (level * 2)
    end
end

game.Players.PlayerAdded:Connect(function(player)
    player.leaderstats.Level.Changed:Connect(function()
        updateStats(player)
    end)
end)

-- script for adding XP (ServerScriptService) 
local function addXP(player, amount)
    local xp = player.leaderstats.XP
    local level = player.leaderstats.Level
    xp.Value = xp.Value + amount

if xp.Value >= level.Value * 100 then
        xp.Value = xp.Value - level.Value * 100
        level.Value = level.Value + 1
    end
end

game.ReplicatedStorage.RemoteEvent.OnServerEvent:Connect(function(player, amount)
    addXP(player, amount)
end)