diff --git a/commandline/commands/Setup.hx b/commandline/commands/Setup.hx
index 23e289cb..2fd3554e 100644
--- a/commandline/commands/Setup.hx
+++ b/commandline/commands/Setup.hx
@@ -23,6 +23,7 @@ class Setup {
 		var CHECK_VSTUDIO = !args.existsOption("no-vscheck");
 		var REINSTALL_ALL = args.existsOption("reinstall");
 		var SILENT = args.existsOption("silent-progress");
+		// TODO: add only install missing libs
 
 		// to prevent messing with currently installed libs
 		if (!FileSystem.exists('.haxelib'))
diff --git a/setup-dev.xml b/setup-dev.xml
index 3f8b70ac..e15dd397 100644
--- a/setup-dev.xml
+++ b/setup-dev.xml
@@ -94,5 +94,20 @@
 		</cmd>
 	</if>
 
+	<if cond="ne_eo">
+		<!-- Ignore this its only for Ne_Eo -->
+		<cmd>
+			<line>haxelib dev lime ../../lime</line>
+			<line>haxelib dev openfl ../../openfl</line>
+			<line>haxelib dev flixel ../../flixel</line>
+			<line>haxelib dev flixel-addons ../../flixel-addons</line>
+			<line>haxelib dev hscript-improved ../../hscript-improved</line>
+			<line>haxelib dev flxanimate ../../flxanimate</line>
+			<!-- <line>haxelib dev hxdiscord_rpc ../../hxdiscord_rpc</line> -->
+			<line>haxelib dev away3d ../../away3d</line>
+			<line>haxelib dev hxcpp ../../../hxcpp</line>
+		</cmd>
+	</if>
+
 	<print pretty="true">Setup for dev libs complete!</print>
 </libraries>
diff --git a/source/flx3d/Flx3DUtil.hx b/source/flx3d/Flx3DUtil.hx
index 029a06f3..e6c85bb0 100644
--- a/source/flx3d/Flx3DUtil.hx
+++ b/source/flx3d/Flx3DUtil.hx
@@ -14,7 +14,7 @@ import flixel.FlxG;
  * @see https://twitter.com/Ne_Eo_Twitch
  */
 @:access(away3d.core.managers.Stage3DManager)
-class Flx3DUtil
+final class Flx3DUtil
 {
 	#if THREE_D_SUPPORT
 	/**
diff --git a/source/funkin/backend/chart/Chart.hx b/source/funkin/backend/chart/Chart.hx
index 87302b71..9fa9c782 100644
--- a/source/funkin/backend/chart/Chart.hx
+++ b/source/funkin/backend/chart/Chart.hx
@@ -11,7 +11,7 @@ import sys.FileSystem;
 
 using StringTools;
 
-class Chart {
+final class Chart {
 	/**
 	 * Default background colors for songs without bg color
 	 */
diff --git a/source/funkin/backend/chart/EventsData.hx b/source/funkin/backend/chart/EventsData.hx
index 630f2269..c7394c18 100644
--- a/source/funkin/backend/chart/EventsData.hx
+++ b/source/funkin/backend/chart/EventsData.hx
@@ -9,7 +9,7 @@ import openfl.Assets;
 
 using StringTools;
 
-class EventsData {
+final class EventsData {
 	public static var defaultEventsList:Array<String> = ["HScript Call", "Camera Movement", "Add Camera Zoom", "Camera Modulo Change", "Camera Flash", "BPM Change", "Scroll Speed Change", "Alt Animation Toggle", "Play Animation"];
 	public static var defaultEventsParams:Map<String, Array<EventParamInfo>> = [
 		"HScript Call" => [
diff --git a/source/funkin/backend/scripting/EventManager.hx b/source/funkin/backend/scripting/EventManager.hx
index 84e7d33f..f2eeb23f 100644
--- a/source/funkin/backend/scripting/EventManager.hx
+++ b/source/funkin/backend/scripting/EventManager.hx
@@ -3,7 +3,7 @@ package funkin.backend.scripting;
 import flixel.FlxState;
 import funkin.backend.scripting.events.*;
 
-class EventManager {
+final class EventManager {
 	// map doesnt work for that
 	public static var eventValues:Array<CancellableEvent> = [];
 	public static var eventKeys:Array<Class<CancellableEvent>> = [];
diff --git a/source/funkin/backend/system/CommandLineHandler.hx b/source/funkin/backend/system/CommandLineHandler.hx
index 3690b6a2..6256c2a2 100644
--- a/source/funkin/backend/system/CommandLineHandler.hx
+++ b/source/funkin/backend/system/CommandLineHandler.hx
@@ -2,7 +2,7 @@ package funkin.backend.system;
 
 #if sys
 import sys.FileSystem;
-class CommandLineHandler {
+final class CommandLineHandler {
 	public static function parseCommandLine(cmd:Array<String>) {
 		var i:Int = 0;
 		while(i < cmd.length) {
diff --git a/source/funkin/backend/system/Logs.hx b/source/funkin/backend/system/Logs.hx
index 1f083324..ce590882 100644
--- a/source/funkin/backend/system/Logs.hx
+++ b/source/funkin/backend/system/Logs.hx
@@ -6,7 +6,7 @@ import funkin.backend.utils.NativeAPI.ConsoleColor;
 import funkin.backend.utils.NativeAPI;
 import haxe.Log;
 
-class Logs {
+final class Logs {
 	private static var __showing:Bool = false;
 
 	public static var nativeTrace = Log.trace;
diff --git a/source/funkin/backend/system/modules/AudioSwitchFix.hx b/source/funkin/backend/system/modules/AudioSwitchFix.hx
index 232c1eb8..c7065f0c 100644
--- a/source/funkin/backend/system/modules/AudioSwitchFix.hx
+++ b/source/funkin/backend/system/modules/AudioSwitchFix.hx
@@ -11,7 +11,7 @@ import lime.media.AudioManager;
  * hi gray itsa me yoshicrafter29 i fixed it hehe
  */
 @:dox(hide)
-class AudioSwitchFix {
+final class AudioSwitchFix {
 	@:noCompletion
 	private static function onStateSwitch(state:FlxState):Void {
 		#if windows
diff --git a/source/funkin/backend/system/modules/CrashHandler.hx b/source/funkin/backend/system/modules/CrashHandler.hx
index 124b915c..6a460ac1 100644
--- a/source/funkin/backend/system/modules/CrashHandler.hx
+++ b/source/funkin/backend/system/modules/CrashHandler.hx
@@ -7,7 +7,7 @@ import openfl.errors.Error;
 import openfl.events.ErrorEvent;
 import openfl.events.UncaughtErrorEvent;
 
-class CrashHandler {
+final class CrashHandler {
 	public static function init() {
 		Lib.current.loaderInfo.uncaughtErrorEvents.addEventListener(UncaughtErrorEvent.UNCAUGHT_ERROR, onUncaughtError);
 		#if cpp
diff --git a/source/funkin/backend/utils/BitmapUtil.hx b/source/funkin/backend/utils/BitmapUtil.hx
index 866f6b25..fb9eefb2 100644
--- a/source/funkin/backend/utils/BitmapUtil.hx
+++ b/source/funkin/backend/utils/BitmapUtil.hx
@@ -5,7 +5,7 @@ import openfl.display.BitmapData;
 import openfl.geom.Point;
 import openfl.geom.Rectangle;
 
-class BitmapUtil {
+final class BitmapUtil {
 	/**
 	 * Returns the most present color in a Bitmap.
 	 * @param bmap Bitmap
diff --git a/source/funkin/backend/utils/CoolUtil.hx b/source/funkin/backend/utils/CoolUtil.hx
index a9acf042..dc250c5a 100644
--- a/source/funkin/backend/utils/CoolUtil.hx
+++ b/source/funkin/backend/utils/CoolUtil.hx
@@ -41,7 +41,7 @@ import openfl.geom.ColorTransform;
 using StringTools;
 
 @:allow(funkin.game.PlayState)
-class CoolUtil
+final class CoolUtil
 {
 	public static function getLastExceptionStack():String {
 		return CallStack.toString(CallStack.exceptionStack());
diff --git a/source/funkin/backend/utils/DiscordUtil.hx b/source/funkin/backend/utils/DiscordUtil.hx
index db3c20c4..01871674 100644
--- a/source/funkin/backend/utils/DiscordUtil.hx
+++ b/source/funkin/backend/utils/DiscordUtil.hx
@@ -16,7 +16,7 @@ import lime.app.Application;
 import sys.thread.Thread;
 #end
 
-class DiscordUtil
+final class DiscordUtil
 {
 	public static var currentID(default, set):String = null;
 	public static var discordThread:#if DISCORD_RPC Thread #else Dynamic #end = null;
diff --git a/source/funkin/backend/utils/DrawUtil.hx b/source/funkin/backend/utils/DrawUtil.hx
index 1d0bc481..8b3976e7 100644
--- a/source/funkin/backend/utils/DrawUtil.hx
+++ b/source/funkin/backend/utils/DrawUtil.hx
@@ -4,7 +4,7 @@ import flixel.util.FlxColor;
 import flixel.math.FlxAngle;
 import flixel.math.FlxPoint;
 
-class DrawUtil {
+final class DrawUtil {
 	public static var line:FlxSprite = null;
 	public static var dot:FlxSprite = null;
 
diff --git a/source/funkin/backend/utils/EngineUtil.hx b/source/funkin/backend/utils/EngineUtil.hx
index 9f0e9157..ebfe916c 100644
--- a/source/funkin/backend/utils/EngineUtil.hx
+++ b/source/funkin/backend/utils/EngineUtil.hx
@@ -3,7 +3,7 @@ package funkin.backend.utils;
 import funkin.backend.scripting.MultiThreadedScript;
 import funkin.backend.scripting.Script;
 
-class EngineUtil {
+final class EngineUtil {
 	/**
 	 * Starts a new multithreaded script.
 	 * This script will share all the variables with the current one, which means already existing callbacks will be replaced by new ones on conflict.
diff --git a/source/funkin/backend/utils/HttpUtil.hx b/source/funkin/backend/utils/HttpUtil.hx
index f2d3caf8..b48fc3d9 100644
--- a/source/funkin/backend/utils/HttpUtil.hx
+++ b/source/funkin/backend/utils/HttpUtil.hx
@@ -2,7 +2,7 @@ package funkin.backend.utils;
 
 import haxe.Http;
 
-class HttpUtil
+final class HttpUtil
 {
 	public static var userAgent:String = "request";
 	public static function requestText(url:String)
diff --git a/source/funkin/backend/utils/IniUtil.hx b/source/funkin/backend/utils/IniUtil.hx
index d7b5738e..646a91b4 100644
--- a/source/funkin/backend/utils/IniUtil.hx
+++ b/source/funkin/backend/utils/IniUtil.hx
@@ -3,7 +3,7 @@ package funkin.backend.utils;
 /**
  * DOESNT SUPPORT CATEGORIES YET!!
  */
-class IniUtil {
+final class IniUtil {
 	public static inline function parseAsset(assetPath:String, ?defaultVariables:Map<String, String>)
 		return parseString(Assets.getText(assetPath), defaultVariables);
 
diff --git a/source/funkin/backend/utils/MarkdownUtil.hx b/source/funkin/backend/utils/MarkdownUtil.hx
index c3692f38..e481198d 100644
--- a/source/funkin/backend/utils/MarkdownUtil.hx
+++ b/source/funkin/backend/utils/MarkdownUtil.hx
@@ -3,7 +3,7 @@ package funkin.backend.utils;
 import flixel.text.FlxText;
 import flixel.util.FlxColor;
 
-class MarkdownUtil {
+final class MarkdownUtil {
 	public static function applyMarkdownText(text:FlxText, str:String) {
 		text.textField.htmlText = Markdown.markdownToHtml(prepareMarkdown(str));
 		var changes:Array<FlxTextFormatMarkerPair> = [
diff --git a/source/funkin/backend/utils/MathUtil.hx b/source/funkin/backend/utils/MathUtil.hx
index aba4736b..06b4e83a 100644
--- a/source/funkin/backend/utils/MathUtil.hx
+++ b/source/funkin/backend/utils/MathUtil.hx
@@ -2,7 +2,7 @@ package funkin.backend.utils;
 
 import haxe.macro.Expr;
 
-class MathUtil {
+final class MathUtil {
 	/**
 	 * Returns the maximum value in the arguments.
 	 * @param args Array of values
diff --git a/source/funkin/backend/utils/MatrixUtil.hx b/source/funkin/backend/utils/MatrixUtil.hx
index 9005c663..41cd5f1f 100644
--- a/source/funkin/backend/utils/MatrixUtil.hx
+++ b/source/funkin/backend/utils/MatrixUtil.hx
@@ -9,7 +9,7 @@ interface IPrePostDraw {
 	public function postDraw():Void;
 }
 
-class MatrixUtil {
+final class MatrixUtil {
 	public static function getMatrixPosition(sprite:FlxSprite, points:OneOfTwo<FlxPoint, Array<FlxPoint>>, ?camera:FlxCamera, _width:Float = 1, _height:Float = 1):Array<FlxPoint>
 	{
 		//if(_width == -1) _width = sprite.width;
diff --git a/source/funkin/backend/utils/MemoryUtil.hx b/source/funkin/backend/utils/MemoryUtil.hx
index 85f7d145..81a6087a 100644
--- a/source/funkin/backend/utils/MemoryUtil.hx
+++ b/source/funkin/backend/utils/MemoryUtil.hx
@@ -14,7 +14,7 @@ import openfl.system.System;
 
 using StringTools;
 
-class MemoryUtil {
+final class MemoryUtil {
 	public static var disableCount:Int = 0;
 
 	public static function askDisable() {
diff --git a/source/funkin/backend/utils/NdllUtil.hx b/source/funkin/backend/utils/NdllUtil.hx
index 97ab5d3e..c0cf1907 100644
--- a/source/funkin/backend/utils/NdllUtil.hx
+++ b/source/funkin/backend/utils/NdllUtil.hx
@@ -14,7 +14,7 @@ package funkin.backend.utils;
  * - The Function cannot be found in the NDLL
  * then an empty function will be returned instead, and a message will be shown in logs.
  */
-class NdllUtil {
+final class NdllUtil {
 	#if NDLLS_SUPPORTED
 		#if windows   public static final os:String = "windows";   #end
 		#if linux     public static final os:String = "linux";     #end
diff --git a/source/funkin/backend/utils/ShaderResizeFix.hx b/source/funkin/backend/utils/ShaderResizeFix.hx
index 96242859..97fc73fe 100644
--- a/source/funkin/backend/utils/ShaderResizeFix.hx
+++ b/source/funkin/backend/utils/ShaderResizeFix.hx
@@ -2,7 +2,7 @@ package funkin.backend.utils;
 
 import openfl.display.Sprite;
 
-class ShaderResizeFix {
+final class ShaderResizeFix {
 	public static var doResizeFix:Bool = true;
 
 	public static function init() {
diff --git a/source/funkin/backend/utils/SortedArrayUtil.hx b/source/funkin/backend/utils/SortedArrayUtil.hx
index ac317811..eee8b5ec 100644
--- a/source/funkin/backend/utils/SortedArrayUtil.hx
+++ b/source/funkin/backend/utils/SortedArrayUtil.hx
@@ -3,7 +3,7 @@ package funkin.backend.utils;
 /**
  * All types of utils only usable in a sorted array.
  */
-class SortedArrayUtil {
+final class SortedArrayUtil {
 	/**
 	 * Gets the index of a possible new element of an Array of T using an efficient algorithm.
 	 * @param array Array of T to check in
diff --git a/source/funkin/backend/utils/ThreadUtil.hx b/source/funkin/backend/utils/ThreadUtil.hx
index fe2cb5bf..8c2f654c 100644
--- a/source/funkin/backend/utils/ThreadUtil.hx
+++ b/source/funkin/backend/utils/ThreadUtil.hx
@@ -1,7 +1,7 @@
 package funkin.backend.utils;
 
 #if ALLOW_MULTITHREADING
-class ThreadUtil {
+final class ThreadUtil {
 	/**
 	 * Creates a new Thread with an error handler.
 	 * @param func Function to execute
diff --git a/source/funkin/backend/utils/WindowUtils.hx b/source/funkin/backend/utils/WindowUtils.hx
index d6210d9a..bf4d2730 100644
--- a/source/funkin/backend/utils/WindowUtils.hx
+++ b/source/funkin/backend/utils/WindowUtils.hx
@@ -2,7 +2,7 @@ package funkin.backend.utils;
 
 import openfl.Lib;
 
-class WindowUtils {
+final class WindowUtils {
 	public static var winTitle(default, set):String;
 	private static function set_winTitle(value:String):String {
 		winTitle = value;
diff --git a/source/funkin/backend/utils/XMLUtil.hx b/source/funkin/backend/utils/XMLUtil.hx
index 52a3bd47..b09d2b4a 100644
--- a/source/funkin/backend/utils/XMLUtil.hx
+++ b/source/funkin/backend/utils/XMLUtil.hx
@@ -15,7 +15,7 @@ typedef TextFormat = { text:String, format:Dynamic }
 /**
  * Class made to make XML parsing easier.
  */
-class XMLUtil {
+final class XMLUtil {
 
 	/**
 	 * Applies a property XML node to an object.
diff --git a/source/funkin/backend/utils/ZipUtil.hx b/source/funkin/backend/utils/ZipUtil.hx
index 16a353c2..f7c5f9e3 100644
--- a/source/funkin/backend/utils/ZipUtil.hx
+++ b/source/funkin/backend/utils/ZipUtil.hx
@@ -23,7 +23,7 @@ using StringTools;
 // import ZipUtils; ZipUtils.uncompressZip(ZipUtils.openZip("E:\\Desktop\\test\\termination lua.ycemod"), "E:\\Desktop\\test\\uncompressed\\");
 // import ZipUtils; var e = ZipUtils.createZipFile("gjnsdghs.ycemod"); ZipUtils.writeFolderToZip(e, "./mods/Friday Night Funkin'/", "Friday Night Funkin'/"); e.flush(); e.close();
 
-class ZipUtil {
+final class ZipUtil {
 	public static var bannedNames:Array<String> = [".git", ".gitignore", ".github", ".vscode", ".gitattributes", "readme.txt"];
 
 	/**
diff --git a/source/funkin/backend/utils/native/Linux.hx b/source/funkin/backend/utils/native/Linux.hx
index 01e6a84b..661c5842 100644
--- a/source/funkin/backend/utils/native/Linux.hx
+++ b/source/funkin/backend/utils/native/Linux.hx
@@ -2,7 +2,8 @@ package funkin.backend.utils.native;
 
 #if linux
 @:cppFileCode("#include <stdio.h>")
-class Linux {
+@:dox(hide)
+final class Linux {
 	@:functionCode('
 		FILE *meminfo = fopen("/proc/meminfo", "r");
 
diff --git a/source/funkin/backend/utils/native/Mac.hx b/source/funkin/backend/utils/native/Mac.hx
index abdb478c..b682d7ac 100644
--- a/source/funkin/backend/utils/native/Mac.hx
+++ b/source/funkin/backend/utils/native/Mac.hx
@@ -5,7 +5,8 @@ import funkin.backend.utils.NativeAPI.CodeCursor;
 import openfl.ui.Mouse;
 
 @:headerInclude('sys/sysctl.h')
-class Mac
+@:dox(hide)
+final class Mac
 {
 	@:functionCode('
 	int mib [] = { CTL_HW, HW_MEMSIZE };
diff --git a/source/funkin/backend/utils/native/Windows.hx b/source/funkin/backend/utils/native/Windows.hx
index a536c75f..eb0b8cf0 100644
--- a/source/funkin/backend/utils/native/Windows.hx
+++ b/source/funkin/backend/utils/native/Windows.hx
@@ -114,7 +114,7 @@ class AudioFixClient : public IMMNotificationClient {
 AudioFixClient *curAudioFix;
 ')
 @:dox(hide)
-class Windows {
+final class Windows {
 
 	public static var __audioChangeCallback:Void->Void = function() {
 		trace("test");