diff --git a/21g30t1e75.js b/21g30t1e75.js
index 83ce25a..9b21ee0 100644
--- a/21g30t1e75.js
+++ b/21g30t1e75.js
@@ -17,7 +17,7 @@ GameLib.CustomCode.GRID_HEIGHT 	= 10;
 GameLib.CustomCode.GRID_OFFSET_X = 1;
 GameLib.CustomCode.GRID_OFFSET_Y = 8;
 
-GameLib.CustomCode.SPEED_INITIAL = 0.5;
+GameLib.CustomCode.SPEED_INITIAL = 1;
 
 GameLib.CustomCode.ORIENTATION_UP       = 0;
 GameLib.CustomCode.ORIENTATION_LEFT     = 1;
@@ -35,6 +35,14 @@ GameLib.CustomCode.POWERUP_LIFE				= 1;
 GameLib.CustomCode.POWERUP_SLOW				= 2;
 GameLib.CustomCode.MAX_POWERUP_ITEMS		= 3;
 
+GameLib.CustomCode.SPEED_GRAIN = 0.1;
+GameLib.CustomCode.MAX_SPEED = 0.3;
+GameLib.CustomCode.MIN_SPEED = GameLib.CustomCode.SPEED_INITIAL;
+
+GameLib.CustomCode.ANIMATION_SPEED_GRAIN = 0.2;
+GameLib.CustomCode.MIN_ANIMATION_SPEED = 2;
+GameLib.CustomCode.MAX_ANIMATION_SPEED = 10;
+
 GameLib.CustomCode.FOOD_BACON		= 0;
 GameLib.CustomCode.FOOD_CHEESE		= 1;
 GameLib.CustomCode.FOOD_ONION		= 2;
@@ -530,7 +538,7 @@ GameLib.CustomCode.prototype.getFreeGridPosition = function() {
     if (positions.length === 0) {
         return null;
     }
-    
+
     var index = GameLib.Utils.GetRandomInt(0, positions.length);
 
     return positions[index];
@@ -774,7 +782,7 @@ GameLib.CustomCode.prototype.createPowerup = function(delta) {
     }
 
     var position = this.getFreeGridPosition();
-    
+
     if (position === null) {
         this.gameOver(true);
     } else {
@@ -784,7 +792,7 @@ GameLib.CustomCode.prototype.createPowerup = function(delta) {
             null,
             position
         );
-    
+
     }
 
 }.bind(this);
@@ -1146,7 +1154,7 @@ GameLib.CustomCode.prototype.extend = function(gameObject, position, orientation
     if (this.snake.length === GameLib.CustomCode.GRID_WIDTH * GameLib.CustomCode.GRID_HEIGHT) {
         this.gameOver(true);
     }
-    
+
 }.bind(this);
 
 /**
@@ -1154,7 +1162,52 @@ GameLib.CustomCode.prototype.extend = function(gameObject, position, orientation
  * @param gameObject
  */
 GameLib.CustomCode.prototype.powerup = function(gameObject) {
-    console.log('powerup');
+
+    if (gameObject.objectType !== GameLib.CustomCode.OBJECT_TYPE_POWERUP) {
+        throw new Error('wrong type of game object');
+    }
+
+    if (gameObject.type === GameLib.CustomCode.POWERUP_LIFE) {
+
+        this.lives += 1;
+
+        if (this.lives > 3) {
+            this.lives = 3;
+        }
+
+    }
+
+    if (gameObject.type === GameLib.CustomCode.POWERUP_SPEED) {
+
+        this.speed -= GameLib.CustomCode.SPEED_GRAIN;
+
+        if (this.speed < GameLib.CustomCode.MAX_SPEED) {
+            this.speed = GameLib.CustomCode.MAX_SPEED;
+        }
+
+        this.animation.translationSpeed += GameLib.CustomCode.ANIMATION_SPEED_GRAIN;
+
+        if (this.animation.translationSpeed > GameLib.CustomCode.MAX_ANIMATION_SPEED) {
+            this.animation.translationSpeed = GameLib.CustomCode.MAX_ANIMATION_SPEED;
+        }
+
+    }
+
+    if (gameObject.type === GameLib.CustomCode.POWERUP_SLOW) {
+
+        this.speed += GameLib.CustomCode.SPEED_GRAIN;
+
+        if (this.speed > GameLib.CustomCode.MIN_SPEED) {
+            this.speed = GameLib.CustomCode.MIN_SPEED;
+        }
+
+        this.animation.translationSpeed -= GameLib.CustomCode.ANIMATION_SPEED_GRAIN;
+
+        if (this.animation.translationSpeed < GameLib.CustomCode.MIN_ANIMATION_SPEED) {
+            this.animation.translationSpeed = GameLib.CustomCode.MIN_ANIMATION_SPEED;
+        }
+
+    }
 
     this.powerups.splice(
         this.powerups.indexOf(gameObject),