Add Version-Check;

js/app.js

@@ -1,6 +1,7 @@
 let game = new Vue({
     el: '#root',
     data: {
+        version: 0.3,
         money: 0,
         loaded: false,
         resources: {
@@ -132,6 +133,8 @@ let game = new Vue({
         loadedIntervals: []
     },
     created() {
+        this.versionCheck();
+
         this.money = this.getSavedMoney();
         this.saveMoney();
         this.loadResources();
@@ -141,6 +144,18 @@ let game = new Vue({
         this.loaded = true;
     },
     methods: {
+        versionCheck() {
+            let lastVersion = localStorage.getItem('lastVersion');
+
+            if ((lastVersion && lastVersion > this.version)) {
+                localStorage.setItem('buildings', this.buildings.stringify());
+                localStorage.setItem('lastVersion', this.version);
+                alert('Buildings have been resetted due to an important update.')
+            } else {
+                localStorage.setItem('lastVersion', this.version);
+            }
+        },
+
         saveMoney() {
             localStorage.setItem('money', String(this.money));
             return this.getSavedMoney();