diff --git a/src/js/changelog.js b/src/js/changelog.js
index d13c471f..face08db 100644
--- a/src/js/changelog.js
+++ b/src/js/changelog.js
@@ -1,5 +1,5 @@
 /**
- * @type {Array<{version: string, date: string, entries: Array<String>}>} changelog
+ * @type {Array<{version: string, date: string, skin?: string, entries: Array<String>}>} changelog
  */
 export const CHANGELOG = [
     {
diff --git a/src/js/game/root.js b/src/js/game/root.js
index d6f5ec0a..8a274680 100644
--- a/src/js/game/root.js
+++ b/src/js/game/root.js
@@ -181,7 +181,7 @@ export class GameRoot {
             freeEntityAreaBeforeBuild: /** @type {TypedSignal<[Entity]>} */ (new Signal()),
 
             // Called with an achievement key and necessary args to validate it can be unlocked.
-            achievementCheck: /** @type {TypedSignal<[string, *]>} */ (new Signal()),
+            achievementCheck: /** @type {TypedSignal<(string|any)[]>} */ (new Signal()),
             bulkAchievementCheck: /** @type {TypedSignal<(string|any)[]>} */ (new Signal()),
         };
 
diff --git a/src/js/platform/achievement_provider.js b/src/js/platform/achievement_provider.js
index 5d7f94bc..01efa815 100644
--- a/src/js/platform/achievement_provider.js
+++ b/src/js/platform/achievement_provider.js
@@ -3,12 +3,13 @@ import { Application } from "../application";
 import { Entity } from "../game/entity";
 import { GameRoot } from "../game/root";
 import { ShapeDefinition } from "../game/shape_definition";
-import { THEMES } from "../game/theme";
+import { VANILLA_THEMES } from "../game/theme";
 /* typehints:end */
 
 import { enumAnalyticsDataSource } from "../game/production_analytics";
 import { ShapeItem } from "../game/items/shape_item";
 import { globalConfig } from "../core/config";
+import { codes } from "../savegame/schemas/ML01";
 
 export const ACHIEVEMENTS = {
     belt500Tiles: "belt500Tiles",
@@ -58,7 +59,7 @@ export const ACHIEVEMENTS = {
     upgradesTier8: "upgradesTier8",
 };
 
-/** @type {keyof typeof THEMES} */
+/** @type {keyof typeof VANILLA_THEMES} */
 const DARK_MODE = "dark";
 
 const HOUR_1 = 3600; // Seconds
@@ -68,8 +69,8 @@ const ITEM_SHAPE = ShapeItem.getId();
 const MINUTE_30 = 1800; // Seconds
 const MINUTE_60 = MINUTE_30 * 2;
 const MINUTE_120 = MINUTE_30 * 4;
-const ROTATER_CCW_CODE = 12;
-const ROTATER_180_CODE = 13;
+const ROTATER_CCW_CODE = codes[12];
+const ROTATER_180_CODE = codes[13];
 const SHAPE_BP = "CbCbCbRb:CwCwCwCw";
 const SHAPE_LOGO = "RuCw--Cw:----Ru--";
 const SHAPE_MS_LOGO = "RgRyRbRr";