diff --git a/src/js/application.js b/src/js/application.js
index c49b7027..66e9eb8c 100644
--- a/src/js/application.js
+++ b/src/js/application.js
@@ -35,6 +35,8 @@ import { PuzzleMenuState } from "./states/puzzle_menu";
 import { ClientAPI } from "./platform/api";
 import { LoginState } from "./states/login";
 import { WegameSplashState } from "./states/wegame_splash";
+import { MODS } from "./mods/modloader";
+import { MOD_SIGNALS } from "./mods/mod_signals";
 
 /**
  * @typedef {import("./platform/achievement_provider").AchievementProviderInterface} AchievementProviderInterface
@@ -128,6 +130,8 @@ export class Application {
         // Store the mouse position, or null if not available
         /** @type {Vector|null} */
         this.mousePosition = null;
+
+        MODS.initMods();
     }
 
     /**
@@ -148,6 +152,8 @@ export class Application {
         this.analytics = new GoogleAnalyticsImpl(this);
         this.gameAnalytics = new ShapezGameAnalytics(this);
         this.achievementProvider = new NoAchievementProvider(this);
+
+        MOD_SIGNALS.platformInstancesInitialized.dispatch();
     }
 
     /**
diff --git a/src/js/game/modes/regular.js b/src/js/game/modes/regular.js
index 699874b5..b52cbc89 100644
--- a/src/js/game/modes/regular.js
+++ b/src/js/game/modes/regular.js
@@ -69,10 +69,16 @@ const tierGrowth = 2.5;
 
 const chinaShapes = G_WEGAME_VERSION || G_CHINA_VERSION;
 
+const upgradesCache = {};
+
 /**
  * Generates all upgrades
  * @returns {Object<string, UpgradeTiers>} */
 function generateUpgrades(limitedVersion = false) {
+    if (upgradesCache[limitedVersion]) {
+        return upgradesCache[limitedVersion];
+    }
+
     const fixedImprovements = [0.5, 0.5, 1, 1, 2, 1, 1];
     const numEndgameUpgrades = limitedVersion ? 0 : 1000 - fixedImprovements.length - 1;
 
@@ -265,6 +271,8 @@ function generateUpgrades(limitedVersion = false) {
         }
     }
 
+    MOD_SIGNALS.modifyUpgrades.dispatch(upgrades);
+
     // VALIDATE
     if (G_IS_DEV) {
         for (const upgradeId in upgrades) {
@@ -280,14 +288,20 @@ function generateUpgrades(limitedVersion = false) {
         }
     }
 
+    upgradesCache[limitedVersion] = upgrades;
     return upgrades;
 }
 
+const levelDefinitionsCache = {};
+
 /**
  * Generates the level definitions
  * @param {boolean} limitedVersion
  */
 export function generateLevelDefinitions(limitedVersion = false) {
+    if (levelDefinitionsCache[limitedVersion]) {
+        return levelDefinitionsCache[limitedVersion];
+    }
     const levelDefinitions = [
         // 1
         // Circle
@@ -524,15 +538,11 @@ export function generateLevelDefinitions(limitedVersion = false) {
         });
     }
 
+    levelDefinitionsCache[limitedVersion] = levelDefinitions;
+
     return levelDefinitions;
 }
 
-const fullVersionUpgrades = generateUpgrades(false);
-const demoVersionUpgrades = generateUpgrades(true);
-
-const fullVersionLevels = generateLevelDefinitions(false);
-const demoVersionLevels = generateLevelDefinitions(true);
-
 export class RegularGameMode extends GameMode {
     static getId() {
         return enumGameModeIds.regular;
@@ -603,9 +613,7 @@ export class RegularGameMode extends GameMode {
      * @returns {Object<string, UpgradeTiers>}
      */
     getUpgrades() {
-        return this.root.app.restrictionMgr.getHasExtendedUpgrades()
-            ? fullVersionUpgrades
-            : demoVersionUpgrades;
+        return generateUpgrades(!this.root.app.restrictionMgr.getHasExtendedUpgrades());
     }
 
     /**
@@ -613,9 +621,7 @@ export class RegularGameMode extends GameMode {
      * @returns {Array<LevelDefinition>}
      */
     getLevelDefinitions() {
-        return this.root.app.restrictionMgr.getHasExtendedLevelsAndFreeplay()
-            ? fullVersionLevels
-            : demoVersionLevels;
+        return generateLevelDefinitions(!this.root.app.restrictionMgr.getHasExtendedLevelsAndFreeplay());
     }
 
     /**
diff --git a/src/js/mods/demo_mod.js b/src/js/mods/demo_mod.js
index 944cae38..e11c3667 100644
--- a/src/js/mods/demo_mod.js
+++ b/src/js/mods/demo_mod.js
@@ -20,8 +20,9 @@ export default function ({ Mod, MetaBuilding }) {
     }
 
     return class ModImpl extends Mod {
-        constructor(modLoader) {
+        constructor(app, modLoader) {
             super(
+                app,
                 {
                     authorContact: "tobias@tobspr.io",
                     authorName: "tobspr",
@@ -37,7 +38,7 @@ export default function ({ Mod, MetaBuilding }) {
             // Add some custom css
             this.modInterface.registerCss(`
                 * {
-                    color: red !important;
+                    font-family: "Comic Sans", "Comic Sans MS", Tahoma !important;
                 }
             `);
 
diff --git a/src/js/mods/mod.js b/src/js/mods/mod.js
index 12992999..b9018b68 100644
--- a/src/js/mods/mod.js
+++ b/src/js/mods/mod.js
@@ -1,4 +1,5 @@
 /* typehints:start */
+import { Application } from "../application";
 import { ModLoader } from "./modloader";
 /* typehints:end */
 
@@ -7,6 +8,7 @@ import { MOD_SIGNALS } from "./mod_signals";
 export class Mod {
     /**
      *
+     * @param {Application} app
      * @param {object} metadata
      * @param {string} metadata.name
      * @param {string} metadata.version
@@ -16,7 +18,8 @@ export class Mod {
      *
      * @param {ModLoader} modLoader
      */
-    constructor(metadata, modLoader) {
+    constructor(app, metadata, modLoader) {
+        this.app = app;
         this.metadata = metadata;
         this.modLoader = modLoader;
 
diff --git a/src/js/mods/mod_interface.js b/src/js/mods/mod_interface.js
index 5d395819..64c4971e 100644
--- a/src/js/mods/mod_interface.js
+++ b/src/js/mods/mod_interface.js
@@ -15,7 +15,7 @@ import {
 import { Loader } from "../core/loader";
 import { LANGUAGES } from "../languages";
 import { matchDataRecursive, T } from "../translations";
-import { registerBuildingVariant } from "../game/building_codes";
+import { gBuildingVariants, registerBuildingVariant } from "../game/building_codes";
 import { gMetaBuildingRegistry } from "../core/global_registries";
 import { MODS_ADDITIONAL_SHAPE_MAP_WEIGHTS } from "../game/map_chunk";
 
@@ -126,11 +126,15 @@ export class ModInterface {
             throw new Error("Tried to register building twice: " + id);
         }
         gMetaBuildingRegistry.register(metaClass);
+        const metaInstance = gMetaBuildingRegistry.findByClass(metaClass);
 
         T.buildings[id] = {};
         variantsAndRotations.forEach(payload => {
             const actualVariant = payload.variant || defaultBuildingVariant;
             registerBuildingVariant(id, metaClass, actualVariant, payload.rotationVariant || 0);
+
+            gBuildingVariants[id].metaInstance = metaInstance;
+
             T.buildings[id][actualVariant] = {
                 name: payload.name,
                 description: payload.description,
diff --git a/src/js/mods/mod_signals.js b/src/js/mods/mod_signals.js
index a2bc0380..23670d8b 100644
--- a/src/js/mods/mod_signals.js
+++ b/src/js/mods/mod_signals.js
@@ -7,9 +7,12 @@ import { BaseHUDPart } from "../game/hud/base_hud_part";
 
 export const MOD_SIGNALS = {
     postInit: new Signal(),
+    platformInstancesInitialized: new Signal(),
+
     injectSprites: new Signal(),
     preprocessTheme: /** @type {TypedSignal<[Object]>} */ (new Signal()),
     modifyLevelDefinitions: /** @type {TypedSignal<[Array[Object]]>} */ (new Signal()),
+    modifyUpgrades: /** @type {TypedSignal<[Object]>} */ (new Signal()),
 
     hudElementInitialized: /** @type {TypedSignal<[BaseHUDPart]>} */ (new Signal()),
     hudElementFinalized: /** @type {TypedSignal<[BaseHUDPart]>} */ (new Signal()),
diff --git a/src/js/mods/modloader.js b/src/js/mods/modloader.js
index 49e30662..8edc2d3d 100644
--- a/src/js/mods/modloader.js
+++ b/src/js/mods/modloader.js
@@ -15,20 +15,14 @@ export class ModLoader {
 
         this.modInterface = new ModInterface(this);
 
-        /** @type {(new (ModLoader) => Mod)[]} */
+        /** @type {((Object) => (new (Application, ModLoader) => Mod))[]} */
         this.modLoadQueue = [];
 
         this.initialized = false;
 
         this.signals = MOD_SIGNALS;
 
-        this.registerMod(
-            /** @type {any} */ (require("./demo_mod").default({
-                Mod,
-                MetaBuilding,
-            }))
-        );
-        this.initMods();
+        this.registerMod(/** @type {any} */ (require("./demo_mod").default));
     }
 
     linkApp(app) {
@@ -39,7 +33,10 @@ export class ModLoader {
         LOG.log("hook:init");
         this.initialized = true;
         this.modLoadQueue.forEach(modClass => {
-            const mod = new modClass(this);
+            const mod = new (modClass({
+                Mod,
+                MetaBuilding,
+            }))(this.app, this);
             mod.init();
             this.mods.push(mod);
         });
@@ -49,7 +46,7 @@ export class ModLoader {
 
     /**
      *
-     * @param {new (ModLoader) => Mod} mod
+     * @param {(Object) => (new (Application, ModLoader) => Mod)} mod
      */
     registerMod(mod) {
         if (this.initialized) {