Camera Manipulation not resetting?

I'm making an intro GUI where the camera rotates around the baseplate, and for the most part it works, although it won't stop rotating.

Notes;

--Using Filtering Enabled
--Local Script
--The for loop works though..

Game place

local target = workspace.Baseplate
local camera = workspace.CurrentCamera
camera.CameraType = Enum.CameraType.Scriptable
camera.CameraSubject = target
local angle = 0

local stillPlay = true
local about = false

function play()
	stillPlay = false
end

function about()
	about = not about
	if about then
		script.Parent.AboutFrame:TweenPosition(UDim2.new(10, 0,0, 0))
	else
		script.Parent.AboutFrame:TweenPosition(UDim2.new(1, 0,0, 0))
	end
end

function doStuff()
	repeat 
		wait()
		camera.CoordinateFrame = CFrame.new(target.Position) 
								* CFrame.Angles(0, angle, 0)
								* CFrame.new(0, 200, 500)
		angle = angle + math.rad(1)
	until not stillPlay
	wait(.5)
	camera.CameraSubject = game.Players.LocalPlayer.Character.Humanoid
	camera.CameraType = "Custom"
	for i = 0.1,2,0.05 do
		script.Parent.BackgroundTransparency = i
		script.Parent.Play.BackgroundTransparency = i
		script.Parent.Play.TextTransparency = i
		script.Parent.About.BackgroundTransparency = i
		script.Parent.About.TextTransparency = i
		script.Parent.AboutFrame.BackgroundTransparency = i
		wait()		
	end
end

if game:GetService("UserInputService").KeyboardEnabled then
	script.Parent:WaitForChild("Play").MouseButton1Click:connect(play)
	script.Parent:WaitForChild("About").MouseButton1Click:connect(about)
else
	script.Parent:WaitForChild("Play").TouchTap:connect(play)
	script.Parent:WaitForChild("About").TouchTap:connect(about)
end

doStuff()

I could not replicate the error in your game place. Are you sure that you didn't accidentally delete a character or something?

This is a modified version of the script that you used so that I can simulate your GUI (I only used a Local Script and TextButton parented to a ScreenGUI) and everything worked:

local target = game.workspace.Baseplate
local camera = game.workspace.CurrentCamera
camera.CameraType = Enum.CameraType.Scriptable
camera.CameraSubject = target
local angle = 0

local stillPlay = true
local about = false

function play()
    stillPlay = false
end

function about()
   
end

function doStuff()
    repeat 
        wait()
        camera.CoordinateFrame = CFrame.new(target.Position) 
                                * CFrame.Angles(0, angle, 0)
                                * CFrame.new(0, 200, 500)
        angle = angle + math.rad(1)
    until not stillPlay
    wait(.5)
    camera.CameraSubject = game.Players.LocalPlayer.Character.Humanoid
    camera.CameraType = "Custom"
    for i = 0.1,2,0.05 do

        script.Parent.Play.BackgroundTransparency = i
        script.Parent.Play.TextTransparency = i

        wait()      
    end
end

if game:GetService("UserInputService").KeyboardEnabled then
    script.Parent:WaitForChild("Play").MouseButton1Click:connect(play)
else
    script.Parent:WaitForChild("Play").TouchTap:connect(play)
end

doStuff()