Why does my Ki Blast key down only work in studio but not in game?

here's the script Player = game.Players.LocalPlayer Character = Player.Character Mouse = Player:GetMouse() Enabled = true

Mouse.KeyDown:connect(function(key) if Enabled == false then return end key = key:lower() if key == "e" then Enabled = false Fireball = Instance.new("Part") Fireball.Shape = "Ball" Fireball.BrickColor = BrickColor.new("Bright red") Fireball.Material = "Neon" Fireball.Parent = Character Fireball.CFrame = Character.Torso.CFrameCFrame.new(0,0,-5) BV = Instance.new("BodyVelocity") BV.maxForce = Vector3.new(math.huge,math.huge,math.huge) BV.velocity = Character.Torso.CFrame.lookVector100 BV.Parent = Fireball end Enabled = true end) )