Why won't these functions execute?

I was making a script, but when I say to execute a function when a certain key is pressed, nothing happens. Also - don't say I should switch to RemoteEvents instead of KeyDown, because RemoteEvents are just awful... Here is the script:

wait(0.1)

local player = game.Players.LocalPlayer
local char = player.Character
local mouse = player:GetMouse()

local s1 = false
local s2 = false

ssj = false

function ssj()
	char.Torso.Anchored = true
	if ssj == false then ssj = true print("SSJ was false.") end
	delay(0, function()
		spawn(function()
			spawn(function()
				for i = 1, 25 do
					local dust = Instance.new("Part", char.Torso)
					dust.Anchored = true
					dust.CanCollide = false
					dust.Transparency = 0.5
					dust.BrickColor = BrickColor.Yellow()
					local dustmesh = Instance.new("SpecialMesh", dust)
					dustmesh.MeshType = "FileMesh"
					dustmesh.MeshId = "http://www.roblox.com/asset/?id=20329976"
					dustmesh.Scale = Vector3.new(1,1,1)
					dust.CFrame = char.Torso.CFrame - Vector3.new(0, 2.5, 0)
					game.Debris:AddItem(dust, 1)
					delay(0, function()
						for i = 1, 20 do
							dustmesh.Scale = dustmesh.Scale + Vector3.new(3.5, 1.75, 3.5)
							dust.Transparency = dust.Transparency + 0.05
							wait(0.1)
						end
					end)
					wait(0.25)
				end
			end)
			s1 = true
		end)
		delay(0, function()
			for i = 1, 25 do
				local ball = Instance.new("Part", char.Torso)
				ball.Anchored = true
				ball.CanCollide = false
				ball.Transparency = 0
				ball.BrickColor = BrickColor.Yellow()
				ball.Shape = "Ball"
				ball.CFrame = char.Torso.CFrame
				ball.TopSurface = "Smooth"
				ball.BottomSurface = "Smooth"
				game.Debris:AddItem(ball, 1)
				delay(0, function()
					for i = 1, 20 do
						ball.Size = ball.Size + Vector3.new(2.5, 2.5, 2.5)
						ball.Transparency = ball.Transparency + 0.05
						wait(0.1)
					end
				end)
				wait(0.25)
			end
		end)
		s2 = true
		delay(0, function()
			spawn(function()
				for i = 1, 5 do
					local spike = Instance.new("Part", char.Torso)
					spike.Anchored = true
					spike.CanCollide = false
					spike.Transparency = 0.5
					spike.BrickColor = BrickColor.new("Deep orange")
					spike.CFrame = char.Torso.CFrame
					local m = Instance.new("SpecialMesh", spike)
					m.MeshId = "rbxassetid://9982590"
					game.Debris:AddItem(spike, 1)
					delay(0,function()
						for i = 1, 20 do
							m.Scale = m.Scale + Vector3.new(2,2,2)
							spike.Transparency = spike.Transparency + 0.05
							spike.Orientation = spike.Orientation + Vector3.new(math.random(1, 10), math.random(1, 10), math.random(1, 10))
							wait(0.1)
						end
					end)
					wait(0.53)
				end
			end)
			delay(0,function()
				for i = 1, 12 do
					local ring = Instance.new("Part", char.Torso)
					ring.Anchored = true
					ring.CanCollide = false
					ring.Transparency = 0.5
					ring.BrickColor = BrickColor.new("Deep orange")
					ring.CFrame = char.Torso.CFrame
					local m = Instance.new("SpecialMesh", ring)
					m.MeshId = "http://www.roblox.com/asset/?id=3270017"
					game.Debris:AddItem(ring, 1)
					delay(0,function()
						for i = 1, 20 do
							m.Scale = m.Scale + Vector3.new(12,12,12)
							ring.Transparency = ring.Transparency + 0.05
							ring.Orientation = ring.Orientation + Vector3.new(math.random(-25, 25), math.random(-25, 25), math.random(-25, 25))
							wait(0.25)
						end
					end)
					wait(0.53)
				end
			end)
		end)
	end)
	wait(5)
	local acc = Instance.new("Accessory", char.Head)
	acc.Name = "SSJHair"
	local handle = Instance.new("Part", acc)
	handle.Name = "Handle"
	handle.CanCollide = false
	handle.BrickColor = BrickColor.new("Deep orange")
	handle.Material = "Neon"
	handle.Transparency = 1
	local m = Instance.new("SpecialMesh", handle)
	m.MeshId = "rbxassetid://430344159"
	m.Scale = Vector3.new(6, 6, 6)
	m.Offset = Vector3.new(0, 0.5, 0.5)
	local w = Instance.new("Weld", handle)
	w.Name = "AccessoryWeld"
	w.Part0 = handle
	w.Part1 = char.Head
	w.C0 = CFrame.new(0, -0.5, 0)
	char.Humanoid:AddAccessory(acc)
	for i = 1, 10 do
		handle.Transparency = handle.Transparency - 0.1
		wait(0.025)
	end
	for i, v in pairs(char:GetChildren()) do
		if v:IsA("Accessory") and v.Name ~= "SSJHair" then
			v.Handle.Transparency = 1
		end
	end
	local color1 = Color3.new(255, 255, 0)
	local p = game.ServerStorage.SSJAura:Clone()
	p.Parent = char.Torso
	p.Color = ColorSequence.new(color1)
	local l = Instance.new("ParticleEmitter", char.Torso)
	l.Size = NumberSequence.new({NumberSequenceKeypoint.new(0, 4, 0), NumberSequenceKeypoint.new(1, 4, 0)})
	l.Lifetime = NumberRange.new(0.1)
	l.Rate = 2
	l.Speed = NumberRange.new(2)
	l.VelocitySpread = NumberRange.new(400)
	l.Color = ColorSequence.new(Color3.new(171, 247, 255))
	l.LightEmission = 0.5
	l.Texture = "rbxassetid://281983189"
	local l2 = l:Clone()
	l2.Texture = "rbxassetid://278520320"
	local l3 = l:Clone()
	l3.Texture = "rbxassetid://281983280"
	local l4 = l:Clone()
	l4.Texture = "rbxassetid://281982895"
	local l5 = l:Clone()
	l5.Texture = "rbxassetid://281983242"
	l2.Parent = char.Torso
	l3.Parent = char.Torso
	l4.Parent = char.Torso
	l5.Parent = char.Torso
	s = Instance.new("Sound", char.Torso)
	s.Looped = true
	s.SoundId = "rbxassetid://828214895"
	s:Play()
	wait(4)
	s.TimePosition = 4
	spawn(function()
		while wait(116) and ssj == true do
			s.TimePosition = 4
		end
	end)
	char.Torso.Anchored = false
end

function nossj()
	s:Stop()
	for i, v in pairs(char:GetChildren()) do
		if v:IsA("Accessory") and v.Name ~= "SSJHair" then
			v.Handle.Transparency = 0
		end
	end
	char.SSJHair:Destroy()
	for i, v in pairs(char.Torso:GetChildren()) do
		if v:IsA("ParticleEmitter") then v:Destroy() end
	end
	if ssj == true then ssj = false print("SSJ was true.") end
end

mouse.KeyDown:connect(function(key)
	if string.lower(key) == "h" then
		wait(0.1)
		ssj()
	elseif string.lower(key) == "h" then
		wait(0.1)
		nossj()
	end
end)