diff --git a/dev-dist/sw.js b/dev-dist/sw.js
index 277f923..65c2199 100644
--- a/dev-dist/sw.js
+++ b/dev-dist/sw.js
@@ -21,20 +21,22 @@ if (!self.define) {
 
   const singleRequire = (uri, parentUri) => {
     uri = new URL(uri + ".js", parentUri).href;
-    return (
-      registry[uri] ||
-      new Promise((resolve) => {
-        if ("document" in self) {
-          const script = document.createElement("script");
-          script.src = uri;
-          script.onload = resolve;
-          document.head.appendChild(script);
-        } else {
-          nextDefineUri = uri;
-          importScripts(uri);
-          resolve();
-        }
-      }).then(() => {
+    return registry[uri] || (
+      
+        new Promise(resolve => {
+          if ("document" in self) {
+            const script = document.createElement("script");
+            script.src = uri;
+            script.onload = resolve;
+            document.head.appendChild(script);
+          } else {
+            nextDefineUri = uri;
+            importScripts(uri);
+            resolve();
+          }
+        })
+      
+      .then(() => {
         let promise = registry[uri];
         if (!promise) {
           throw new Error(`Module ${uri} didn’t register its module`);
@@ -45,31 +47,27 @@ if (!self.define) {
   };
 
   self.define = (depsNames, factory) => {
-    const uri =
-      nextDefineUri ||
-      ("document" in self ? document.currentScript.src : "") ||
-      location.href;
+    const uri = nextDefineUri || ("document" in self ? document.currentScript.src : "") || location.href;
     if (registry[uri]) {
       // Module is already loading or loaded.
       return;
     }
     let exports = {};
-    const require = (depUri) => singleRequire(depUri, uri);
+    const require = depUri => singleRequire(depUri, uri);
     const specialDeps = {
       module: { uri },
       exports,
-      require,
+      require
     };
-    registry[uri] = Promise.all(
-      depsNames.map((depName) => specialDeps[depName] || require(depName))
-    ).then((deps) => {
+    registry[uri] = Promise.all(depsNames.map(
+      depName => specialDeps[depName] || require(depName)
+    )).then(deps => {
       factory(...deps);
       return exports;
     });
   };
 }
-define(["./workbox-b7fccfec"], function (workbox) {
-  "use strict";
+define(['./workbox-b7fccfec'], (function (workbox) { 'use strict';
 
   self.skipWaiting();
   workbox.clientsClaim();
@@ -79,44 +77,28 @@ define(["./workbox-b7fccfec"], function (workbox) {
    * requests for URLs in the manifest.
    * See https://goo.gl/S9QRab
    */
-  workbox.precacheAndRoute(
-    [
-      {
-        url: "registerSW.js",
-        revision: "3ca0b8505b4bec776b69afdba2768812",
-      },
-      {
-        url: "index.html",
-        revision: "0.0ufj7f4tmog",
-      },
-    ],
-    {}
-  );
+  workbox.precacheAndRoute([{
+    "url": "registerSW.js",
+    "revision": "3ca0b8505b4bec776b69afdba2768812"
+  }, {
+    "url": "index.html",
+    "revision": "0.fnf2e5c80tg"
+  }], {});
   workbox.cleanupOutdatedCaches();
-  workbox.registerRoute(
-    new workbox.NavigationRoute(workbox.createHandlerBoundToURL("index.html"), {
-      allowlist: [/^\/$/],
-    })
-  );
-  workbox.registerRoute(
-    ({ url }) =>
-      [
-        /^https:\/\/raw\.githubusercontent\.com\/.*/i,
-        /^https:\/\/shabda\.ndre\.gr\/.*/i,
-      ].some((regex) => regex.test(url)),
-    new workbox.CacheFirst({
-      cacheName: "external-samples",
-      plugins: [
-        new workbox.ExpirationPlugin({
-          maxEntries: 5000,
-          maxAgeSeconds: 2592000,
-        }),
-        new workbox.CacheableResponsePlugin({
-          statuses: [0, 200],
-        }),
-      ],
-    }),
-    "GET"
-  );
-});
+  workbox.registerRoute(new workbox.NavigationRoute(workbox.createHandlerBoundToURL("index.html"), {
+    allowlist: [/^\/$/]
+  }));
+  workbox.registerRoute(({
+    url
+  }) => [/^https:\/\/raw\.githubusercontent\.com\/.*/i, /^https:\/\/shabda\.ndre\.gr\/.*/i].some(regex => regex.test(url)), new workbox.CacheFirst({
+    "cacheName": "external-samples",
+    plugins: [new workbox.ExpirationPlugin({
+      maxEntries: 5000,
+      maxAgeSeconds: 2592000
+    }), new workbox.CacheableResponsePlugin({
+      statuses: [0, 200]
+    })]
+  }), 'GET');
+
+}));
 //# sourceMappingURL=sw.js.map
diff --git a/dev-dist/sw.js.map b/dev-dist/sw.js.map
index dc9bc86..0b8b926 100644
--- a/dev-dist/sw.js.map
+++ b/dev-dist/sw.js.map
@@ -1 +1 @@
-{"version":3,"file":"sw.js","sources":["../../../private/var/folders/zq/nwpwzg_s2rq87xq7zggqfvhw0000gn/T/64cbd6a2ae1a8b15bd88c606dc97a28a/sw.js"],"sourcesContent":["import {registerRoute as workbox_routing_registerRoute} from '/Users/bubo/Topos/node_modules/workbox-routing/registerRoute.mjs';\nimport {ExpirationPlugin as workbox_expiration_ExpirationPlugin} from '/Users/bubo/Topos/node_modules/workbox-expiration/ExpirationPlugin.mjs';\nimport {CacheableResponsePlugin as workbox_cacheable_response_CacheableResponsePlugin} from '/Users/bubo/Topos/node_modules/workbox-cacheable-response/CacheableResponsePlugin.mjs';\nimport {CacheFirst as workbox_strategies_CacheFirst} from '/Users/bubo/Topos/node_modules/workbox-strategies/CacheFirst.mjs';\nimport {clientsClaim as workbox_core_clientsClaim} from '/Users/bubo/Topos/node_modules/workbox-core/clientsClaim.mjs';\nimport {precacheAndRoute as workbox_precaching_precacheAndRoute} from '/Users/bubo/Topos/node_modules/workbox-precaching/precacheAndRoute.mjs';\nimport {cleanupOutdatedCaches as workbox_precaching_cleanupOutdatedCaches} from '/Users/bubo/Topos/node_modules/workbox-precaching/cleanupOutdatedCaches.mjs';\nimport {NavigationRoute as workbox_routing_NavigationRoute} from '/Users/bubo/Topos/node_modules/workbox-routing/NavigationRoute.mjs';\nimport {createHandlerBoundToURL as workbox_precaching_createHandlerBoundToURL} from '/Users/bubo/Topos/node_modules/workbox-precaching/createHandlerBoundToURL.mjs';/**\n * Welcome to your Workbox-powered service worker!\n *\n * You'll need to register this file in your web app.\n * See https://goo.gl/nhQhGp\n *\n * The rest of the code is auto-generated. Please don't update this file\n * directly; instead, make changes to your Workbox build configuration\n * and re-run your build process.\n * See https://goo.gl/2aRDsh\n */\n\n\n\n\n\n\n\n\nself.skipWaiting();\n\nworkbox_core_clientsClaim();\n\n\n/**\n * The precacheAndRoute() method efficiently caches and responds to\n * requests for URLs in the manifest.\n * See https://goo.gl/S9QRab\n */\nworkbox_precaching_precacheAndRoute([\n  {\n    \"url\": \"registerSW.js\",\n    \"revision\": \"3ca0b8505b4bec776b69afdba2768812\"\n  },\n  {\n    \"url\": \"index.html\",\n    \"revision\": \"0.0ufj7f4tmog\"\n  }\n], {});\nworkbox_precaching_cleanupOutdatedCaches();\nworkbox_routing_registerRoute(new workbox_routing_NavigationRoute(workbox_precaching_createHandlerBoundToURL(\"index.html\"), {\n  allowlist: [/^\\/$/],\n  \n}));\n\n\nworkbox_routing_registerRoute(({ url }) => [\n          /^https:\\/\\/raw\\.githubusercontent\\.com\\/.*/i,\n          /^https:\\/\\/shabda\\.ndre\\.gr\\/.*/i\n        ].some((regex) => regex.test(url)), new workbox_strategies_CacheFirst({ \"cacheName\":\"external-samples\", plugins: [new workbox_expiration_ExpirationPlugin({ maxEntries: 5000, maxAgeSeconds: 2592000 }), new workbox_cacheable_response_CacheableResponsePlugin({ statuses: [ 0, 200 ] })] }), 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\ No newline at end of file
+{"version":3,"file":"sw.js","sources":["../../../private/var/folders/zq/nwpwzg_s2rq87xq7zggqfvhw0000gn/T/4cb1b00f4bee683af74502b1c16aa53c/sw.js"],"sourcesContent":["import {registerRoute as workbox_routing_registerRoute} from '/Users/bubo/Topos/node_modules/workbox-routing/registerRoute.mjs';\nimport {ExpirationPlugin as workbox_expiration_ExpirationPlugin} from '/Users/bubo/Topos/node_modules/workbox-expiration/ExpirationPlugin.mjs';\nimport {CacheableResponsePlugin as workbox_cacheable_response_CacheableResponsePlugin} from '/Users/bubo/Topos/node_modules/workbox-cacheable-response/CacheableResponsePlugin.mjs';\nimport {CacheFirst as workbox_strategies_CacheFirst} from '/Users/bubo/Topos/node_modules/workbox-strategies/CacheFirst.mjs';\nimport {clientsClaim as workbox_core_clientsClaim} from '/Users/bubo/Topos/node_modules/workbox-core/clientsClaim.mjs';\nimport {precacheAndRoute as workbox_precaching_precacheAndRoute} from '/Users/bubo/Topos/node_modules/workbox-precaching/precacheAndRoute.mjs';\nimport {cleanupOutdatedCaches as workbox_precaching_cleanupOutdatedCaches} from '/Users/bubo/Topos/node_modules/workbox-precaching/cleanupOutdatedCaches.mjs';\nimport {NavigationRoute as workbox_routing_NavigationRoute} from '/Users/bubo/Topos/node_modules/workbox-routing/NavigationRoute.mjs';\nimport {createHandlerBoundToURL as workbox_precaching_createHandlerBoundToURL} from '/Users/bubo/Topos/node_modules/workbox-precaching/createHandlerBoundToURL.mjs';/**\n * Welcome to your Workbox-powered service worker!\n *\n * You'll need to register this file in your web app.\n * See https://goo.gl/nhQhGp\n *\n * The rest of the code is auto-generated. Please don't update this file\n * directly; instead, make changes to your Workbox build configuration\n * and re-run your build process.\n * See https://goo.gl/2aRDsh\n */\n\n\n\n\n\n\n\n\nself.skipWaiting();\n\nworkbox_core_clientsClaim();\n\n\n/**\n * The precacheAndRoute() method efficiently caches and responds to\n * requests for URLs in the manifest.\n * See https://goo.gl/S9QRab\n */\nworkbox_precaching_precacheAndRoute([\n  {\n    \"url\": \"registerSW.js\",\n    \"revision\": \"3ca0b8505b4bec776b69afdba2768812\"\n  },\n  {\n    \"url\": \"index.html\",\n    \"revision\": \"0.fnf2e5c80tg\"\n  }\n], {});\nworkbox_precaching_cleanupOutdatedCaches();\nworkbox_routing_registerRoute(new workbox_routing_NavigationRoute(workbox_precaching_createHandlerBoundToURL(\"index.html\"), {\n  allowlist: [/^\\/$/],\n  \n}));\n\n\nworkbox_routing_registerRoute(({ url }) => [\n          /^https:\\/\\/raw\\.githubusercontent\\.com\\/.*/i,\n          /^https:\\/\\/shabda\\.ndre\\.gr\\/.*/i\n        ].some((regex) => regex.test(url)), new workbox_strategies_CacheFirst({ \"cacheName\":\"external-samples\", plugins: [new workbox_expiration_ExpirationPlugin({ maxEntries: 5000, maxAgeSeconds: 2592000 }), new workbox_cacheable_response_CacheableResponsePlugin({ statuses: [ 0, 200 ] })] }), 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\ No newline at end of file
diff --git a/src/API.ts b/src/API.ts
index 6134353..f88eb09 100644
--- a/src/API.ts
+++ b/src/API.ts
@@ -78,12 +78,18 @@ export class UserAPI {
   }
 
   _loadUniverseFromInterface = (universe: string) => {
+    this.app.selected_universe = universe.trim();
+    this.app.settings.selected_universe = universe.trim();
     loadUniverse(this.app, universe as string);
     openUniverseModal();
   };
 
   _deleteUniverseFromInterface = (universe: string) => {
     delete this.app.universes[universe];
+    if (this.app.settings.selected_universe === universe) {
+      this.app.settings.selected_universe = "Welcome";
+      this.app.selected_universe = "Welcome";
+    }
     this.app.settings.saveApplicationToLocalStorage(
       this.app.universes,
       this.app.settings
diff --git a/src/FileManagement.ts b/src/FileManagement.ts
index 6b8b969..fc97d00 100644
--- a/src/FileManagement.ts
+++ b/src/FileManagement.ts
@@ -1,4 +1,4 @@
-import { tutorial_universe } from "./universes/tutorial";
+// import { tutorial_universe } from "./universes/tutorial";
 import { gzipSync, decompressSync, strFromU8 } from "fflate";
 import { examples } from "./examples/excerpts";
 import { type Editor } from "./main";
@@ -109,7 +109,7 @@ export const template_universes = {
     example: { candidate: "", committed: "", evaluations: 0 },
     notes: { candidate: "" },
   },
-  Help: tutorial_universe,
+  //Help: tutorial_universe,
 };
 
 export class AppSettings {
@@ -247,13 +247,21 @@ export const initializeSelectedUniverse = (app: Editor): void => {
    */
   if (app.settings.load_demo_songs) {
     let random_example = examples[Math.floor(Math.random() * examples.length)];
-    app.selected_universe = "Welcome";
+    app.selected_universe = "Demo";
+    app.universes[app.selected_universe] = structuredClone(template_universe);
     app.universes[app.selected_universe].global.committed = random_example;
     app.universes[app.selected_universe].global.candidate = random_example;
   } else {
-    app.selected_universe = app.settings.selected_universe;
-    if (app.universes[app.selected_universe] === undefined)
+    try {
+      app.selected_universe = app.settings.selected_universe;
+      if (app.universes[app.selected_universe] === undefined)
+        app.universes[app.selected_universe] =
+          structuredClone(template_universe);
+    } catch (error) {
+      app.settings.selected_universe = "Welcome";
+      app.selected_universe = app.settings.selected_universe;
       app.universes[app.selected_universe] = structuredClone(template_universe);
+    }
   }
   app.interface.universe_viewer.innerHTML = `Topos: ${app.selected_universe}`;
 };
@@ -315,22 +323,20 @@ export const loadUniverse = (
   universeName: string,
   universe: Universe = template_universe
 ): void => {
-  console.log(universeName, universe);
-  app.currentFile().candidate = app.view.state.doc.toString();
-
-  // Getting the new universe name and moving on
   let selectedUniverse = universeName.trim();
   if (app.universes[selectedUniverse] === undefined) {
-    app.settings.universes[selectedUniverse] = universe;
-    app.universes[selectedUniverse] = universe;
+    // Pushing a freshly cloned template universe to:
+    // 1) the current session 2) the settings
+    const freshUniverse = structuredClone(universe);
+    app.universes[selectedUniverse] = freshUniverse;
+    app.settings.universes[selectedUniverse] = freshUniverse;
   }
+  // Updating references to the currently selected universe
+  app.settings.selected_universe = selectedUniverse;
   app.selected_universe = selectedUniverse;
-  app.settings.selected_universe = app.selected_universe;
   app.interface.universe_viewer.innerHTML = `Topos: ${selectedUniverse}`;
-
   // Updating the editor View to reflect the selected universe
   app.updateEditorView();
-
   // Evaluating the initialisation script for the selected universe
   tryEvaluate(app, app.universes[app.selected_universe.toString()].init);
 };
diff --git a/src/InterfaceLogic.ts b/src/InterfaceLogic.ts
index edc924f..4f38458 100644
--- a/src/InterfaceLogic.ts
+++ b/src/InterfaceLogic.ts
@@ -23,6 +23,7 @@ import { inlineHoveringTips } from "./documentation/inlineHelp";
 import { lineNumbers } from "@codemirror/view";
 import { jsCompletions } from "./EditorSetup";
 import { createDocumentationStyle } from "./DomElements";
+import { saveState } from "./WindowBehavior";
 
 export const installInterfaceLogic = (app: Editor) => {
   // Initialize style
@@ -184,8 +185,8 @@ export const installInterfaceLogic = (app: Editor) => {
   app.interface.load_universe_button.addEventListener("click", () => {
     let query = (app.interface.buffer_search as HTMLInputElement).value;
     if (query.length > 2 && query.length < 20 && !query.includes(" ")) {
-      loadUniverse(app, query);
       app.settings.selected_universe = query;
+      loadUniverse(app, query);
       (app.interface.buffer_search as HTMLInputElement).value = "";
       closeUniverseModal();
       app.view.focus();
@@ -336,6 +337,7 @@ export const installInterfaceLogic = (app: Editor) => {
   });
 
   app.interface.close_universes_button.addEventListener("click", () => {
+    saveState(app);
     openUniverseModal();
   });
 
@@ -443,8 +445,10 @@ export const installInterfaceLogic = (app: Editor) => {
 
     if (universeName) {
       if (universeName.length > 2 && universeName.length < 20) {
-        loadUniverse(app, universeName);
+        universeName = universeName.trim();
         app.settings.selected_universe = universeName;
+        app.selected_universe = universeName;
+        loadUniverse(app, universeName);
         (app.interface.buffer_search as HTMLInputElement).value = "";
         closeUniverseModal();
         app.view.focus();
diff --git a/src/WindowBehavior.ts b/src/WindowBehavior.ts
index 2686844..b5e5a1d 100644
--- a/src/WindowBehavior.ts
+++ b/src/WindowBehavior.ts
@@ -68,22 +68,4 @@ export const installWindowBehaviors = (
       false
     );
   }
-
-  window.addEventListener(
-    "error",
-    (e) => {
-      console.log("Je suis bien installé !");
-      console.log(
-        e.message,
-        "\n",
-        e.filename,
-        ":",
-        e.lineno,
-        e.colno ? ":" + e.colno : "",
-        e.error && e.error.stack ? "\n" : "",
-        e.error ? e.error.stack : undefined
-      );
-    },
-    false
-  );
 };
diff --git a/src/main.ts b/src/main.ts
index fa3dc3f..82078a0 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -20,7 +20,7 @@ import * as oeis from "jisg";
 import * as zpatterns from "zifferjs/src/patterns.ts";
 import { makeArrayExtensions } from "./extensions/ArrayExtensions";
 import "./style.css";
-import { Universes, File, template_universes } from "./FileManagement";
+import { Universes, File } from "./FileManagement";
 import { tryEvaluate } from "./Evaluator";
 // @ts-ignore
 import showdown from "showdown";
@@ -39,7 +39,7 @@ if ("serviceWorker" in navigator) {
 export class Editor {
   // Universes and settings
   settings: AppSettings = new AppSettings();
-  universes: Universes = template_universes;
+  universes: Universes = {};
   selected_universe: string = "Welcome";
 
   fill: boolean = false;
@@ -115,7 +115,7 @@ export class Editor {
 
     this.universes = {
       ...this.settings.universes,
-      ...template_universes,
+      //...template_universes,
     };
     initializeSelectedUniverse(this);
 
@@ -237,7 +237,7 @@ export class Editor {
     list.append(
       ...Object.keys(this.universes).map((it) => {
         let item = itemTemplate.content.cloneNode(true) as DocumentFragment;
-        let api = window as unknown as UserAPI; // It's dirty but okey
+        let api = window as unknown as UserAPI;
         item.querySelector(".universe-name")!.textContent = it;
         item
           .querySelector(".load-universe")
diff --git a/src/universes/tutorial.ts b/src/universes/tutorial.ts
index a38c7d9..40e2371 100644
--- a/src/universes/tutorial.ts
+++ b/src/universes/tutorial.ts
@@ -61,7 +61,7 @@ const init_buffer = `// ,,
 // be available from the start. It is only executed once, so if you want to change something, you need to
 // reload the universe or force the reloading: Ctrl+Shift+Enter.
 
-bpm(140) // set the bpm to 140
+tempo(140) // set the bpm to 140
 `;
 
 const note_buffer = `# Notes
diff --git a/vite.config.js b/vite.config.js
index 3b0de49..ffdfc9b 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -28,9 +28,11 @@ const vitePWAconfiguration = {
     enabled: true,
   },
   workbox: {
-    sourcemap: true,
+    sourcemap: false,
     cleanupOutdatedCaches: true,
-    globPatterns: ["**/*.{js,css,html,gif,png,json,woff,json,ogg,wav,mp3,ico,png,svg}"],
+    globPatterns: [
+      "**/*.{js,css,html,gif,png,json,woff,json,ogg,wav,mp3,ico,png,svg}",
+    ],
     // Thanks Froos :)
     runtimeCaching: [
       {
@@ -39,9 +41,9 @@ const vitePWAconfiguration = {
             /^https:\/\/raw\.githubusercontent\.com\/.*/i,
             /^https:\/\/shabda\.ndre\.gr\/.*/i,
           ].some((regex) => regex.test(url)),
-        handler: 'CacheFirst',
+        handler: "CacheFirst",
         options: {
-          cacheName: 'external-samples',
+          cacheName: "external-samples",
           expiration: {
             maxEntries: 5000,
             maxAgeSeconds: 60 * 60 * 24 * 30, // <== 14 days