diff --git a/index.html b/index.html
index 01c7b23..722e1af 100644
--- a/index.html
+++ b/index.html
@@ -47,7 +47,7 @@
                         <br/>
                         <br/>
                         <a href="javascript:" class="btn btn-sm btn-success float-right" @click="redeemReward()">Redeem reward ({{ currentQuest.reward }} <img class="resource-icon" src="img/gold.png">)</a>
-                        <a class="btn btn-sm btn-info float-right" style="margin-right: 1em;" @click="generateQuestWithRandomItems(true)"><i class="fas fa-question"></i> Get a new quest ({{ 3 - questSkipCounter }} left)</a>
+                        <a class="btn btn-sm btn-info float-right" style="margin-right: 1em;" @click="generateQuestWithRandomItems(true)"><i class="fas fa-question"></i> Get a new quest for 250 <img class="resource-icon" src="img/gold.png"> ({{ 3 - questSkipCounter }} left)</a>
                     </div>
                     <div v-else>
                         You don't have a quest at the moment. <br/>
diff --git a/js/app.js b/js/app.js
index 40ae019..fa3834b 100644
--- a/js/app.js
+++ b/js/app.js
@@ -18,56 +18,56 @@ let game = new Vue({
             gold: {
                 amount: 500,
                 name: 'Gold',
-                worth: 100,
+                worth: 1,
                 icon: 'img/gold.png',
                 unlocked: true
             },
             wood: {
                 amount: 0,
                 name: 'Wood',
-                worth: 10,
+                worth: 5,
                 icon: 'img/wood.png',
                 unlocked: false
             },
             stone: {
                 amount: 0,
                 name: 'Stone',
-                worth: 25,
+                worth: 10,
                 icon: 'img/stone.png',
                 unlocked: false
             },
             iron: {
                 amount: 0,
                 name: 'Iron',
-                worth: 100,
+                worth: 25,
                 icon: 'img/iron.png',
                 unlocked: false
             },
             bricks: {
                 amount: 0,
                 name: 'Bricks',
-                worth: 200,
+                worth: 50,
                 icon: 'img/bricks.png',
                 unlocked: false
             },
             corn: {
                 amount: 0,
                 name: 'Corn',
-                worth: 75,
+                worth: 35,
                 icon: 'img/corn.png',
                 unlocked: false
             },
             coal: {
                 amount: 0,
                 name: 'Coal',
-                worth: 25,
+                worth: 30,
                 icon: 'img/coal.png',
                 unlocked: false
             },
             planks: {
                 amount: 0,
                 name: 'Planks',
-                worth: 100,
+                worth: 75,
                 icon: 'img/planks.png',
                 unlocked: false
             }
@@ -85,7 +85,7 @@ let game = new Vue({
                 amount: 100,
                 intervalInSeconds: 15,
                 price: 500,
-                amountPerLevel: [100, 250, 500, 750, 1000, 1500, 2000, 2500, 3000, 5000],
+                amountPerLevel: [100, 150, 500, 750, 1000, 1500, 2000, 2500, 3000, 5000],
                 pricePerLevel: [500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000],
                 intervalPerLevel: [15, 25, 30, 45, 60, 90, 90, 120, 120, 120],
             },
@@ -100,9 +100,12 @@ let game = new Vue({
                 amount: 2,
                 intervalInSeconds: 10,
                 price: 250,
-                amountPerLevel: [10, 15, 20, 25, 30, 35, 40, 45, 50, 55],
-                pricePerLevel: [500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000],
-                intervalPerLevel: [15, 15, 15, 15, 15, 15, 15, 15, 15, 15],
+                resourcesToBuild: {
+                    gold: 250
+                },
+                amountPerLevel:     [10, 15, 20, 25, 30, 30, 30, 30, 30, 30],
+                pricePerLevel:      [250, 500, 1000, 1250, 1500, 2000, 3000, 4000, 5000, 6000],
+                intervalPerLevel:   [15, 15, 15, 15, 15, 15, 10, 10, 5, 5],
             },
             carpenter: {
                 name: 'Carpenter',
@@ -119,6 +122,10 @@ let game = new Vue({
                 requires: {
                     wood: 2
                 },
+                resourcesToBuild: {
+                    wood: 600,
+                    stone: 250
+                },
                 amountPerLevel: [100, 250, 500, 750, 1000, 1500, 2000, 2500, 3000, 5000],
                 pricePerLevel: [500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000],
                 intervalPerLevel: [15, 25, 30, 45, 60, 90, 90, 120, 120, 120],
@@ -134,6 +141,9 @@ let game = new Vue({
                 amount: 2,
                 intervalInSeconds: 20,
                 price: 500,
+                resourcesToBuild: {
+                    wood: 500
+                },
                 amountPerLevel: [100, 250, 500, 750, 1000, 1500, 2000, 2500, 3000, 5000],
                 pricePerLevel: [500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000],
                 intervalPerLevel: [15, 25, 30, 45, 60, 90, 90, 120, 120, 120],
@@ -404,8 +414,9 @@ let game = new Vue({
 
             if (resourcesMissing.length) {
                 resourcesMissing.forEach((resource) => {
-                    game.sendWarning(
-                        'Not enough ' + resource + ' to build ' + building.name + '!'
+                    game.sendNotEnoughResourceToBuildWarning(
+                        'Not enough ' + resource + ' to build ' + building.name + '!',
+                        building
                     );
                 });
 
@@ -432,6 +443,10 @@ let game = new Vue({
         upgradeBuilding(building, first = false) {
             if (building.level < (building.maxLevel)) {
                 building.level++;
+                this.sendBuildingUpgradedNotification(
+                    building.name + ' has been upgraded to level ' + building.level + '!',
+                    building
+                );
 
                 if (building.level === building.maxLevel) {
                     building.isUpgradeable = false;
@@ -531,7 +546,13 @@ let game = new Vue({
 
             if (rewardSum > 0) {
                 if (skip) {
-                    game.questSkipCounter++;
+                    if (game.resources.gold.amount > 250) {
+                        game.resources.gold.amount -= 250;
+                        game.questSkipCounter++;
+                    } else {
+                        game.sendWarning('Not enough gold to skip this quest');
+                        return false;
+                    }
                 }
 
                 quest['reward'] = rewardSum;
@@ -681,6 +702,28 @@ let game = new Vue({
             });
         },
 
+        sendNotEnoughResourceToBuildWarning(message, building) {
+            iziToast.show({
+                color: 'red',
+                message: message,
+                image: 'img/' + building.icon + '.png',
+                position: 'bottomCenter',
+                transitionIn: 'boundInRight',
+                transitionInMobile: 'boundInRight'
+            });
+        },
+
+        sendBuildingUpgradedNotification(message, building) {
+            iziToast.show({
+                color: 'green',
+                message: message,
+                image: 'img/' + building.icon + '.png',
+                position: 'bottomCenter',
+                transitionIn: 'boundInRight',
+                transitionInMobile: 'boundInRight'
+            });
+        },
+
         sendWarning(message) {
             iziToast.show({
                 color: 'red',