Simplyfied the code. Ready to rebuild on top of.

main.js

@@ -1,47 +1,27 @@
+// ########################################
+// ########## 		MAIN		 ##########
+// ########################################
 
-/*  ######################
-    # Screeps       2022 #
-    ######################*/
 
-const system = require("system");
+const system = require("System");
 
 module.exports.loop = function () {
-    if (global.compiled == undefined) {
-        // Configure classes and constants
-        setupClasses();
-        setConstants();
-        console.log("Script recompiled...");
-        global.compiled = true;
-    } else {
-        if (global.started == undefined) {
-            // After one tick of configuration, restart the system.
-            system.start();
-            console.log("System started...");
-            global.started = true;
-        }
-        system.update();
-    }
+    if(!global.compiled) onRecompile();
+    else if (!global.started) onRestart();
+    else onTick(); 
 }
 
-const creepClass = require("ClassCreep");
-const roomClass = require("ClassRoom");
-const spawnClass = require("ClassSpawn");
-
-// Overwrite all game defined classes by inherited ones.
-function setupClasses() {
-    creepClass.setup();
-    roomClass.setup();
-    spawnClass.setup();
+function onRecompile(){
+    system.setup();
+    console.log("Script recompiled...");
+    global.compiled = true;
 }
 
-// Adds additional constants to global scope
-function setConstants() {
-    // The states of a room.
-    global.ROOMSTATE_NEUTRAL = 0;
-    global.ROOMSTATE_CAPITAL = 1;
-    global.ROOMSTATE_COLONY = 2;
-    global.ROOMSTATE_OUTPOST = 3;
+function onRestart(){
+    system.begin();
+    global.started = true;
+}
 
-    // The roles of creeps.
-    global.ROLE_HARVESTER = 0;
+function onTick(){
+    system.tick();
 }