diff --git a/lesson#28 - Simple spritesheet animation/ourGame/source/app.d b/lesson#28 - Simple spritesheet animation/ourGame/source/app.d
index 90244f2..79504a7 100644
--- a/lesson#28 - Simple spritesheet animation/ourGame/source/app.d	
+++ b/lesson#28 - Simple spritesheet animation/ourGame/source/app.d	
@@ -2,8 +2,8 @@ module app;
 
 import game.data;
 import game.gstatemanager;
-import game.menu;
-import game.play;
+import game.state.menu;
+import game.state.play;
 
 void main() {
     validateRaylibBinding();
diff --git a/lesson#28 - Simple spritesheet animation/ourGame/source/game/animation/animation.d b/lesson#28 - Simple spritesheet animation/ourGame/source/game/animation/animation.d
new file mode 100644
index 0000000..95d6704
--- /dev/null
+++ b/lesson#28 - Simple spritesheet animation/ourGame/source/game/animation/animation.d	
@@ -0,0 +1,62 @@
+module game.animation.animation;
+
+import raylib;
+
+struct Animation {
+    private {
+        Texture2D texture;
+        Rectangle[] rectFrames;
+        int numFrames;
+        int currentFrame;
+        float frameTimeSecs;
+        float frameTimeSecsLeft;
+        bool isActive;
+    }
+
+    this(in Texture2D texture, in int numFrames, in float frameTimeSecs) {
+        this.texture = texture;
+        this.numFrames = numFrames;
+        this.frameTimeSecs = frameTimeSecs;
+        this.frameTimeSecsLeft = frameTimeSecs;
+        this.currentFrame = 0;
+        this.isActive = true;
+
+        // create rectangle frames
+        immutable frameWidth = texture.width / numFrames;
+        immutable frameHeight = texture.height;
+        foreach(i; 0 .. numFrames) {
+            this.rectFrames ~= Rectangle(i * frameWidth, frameHeight, frameWidth, frameHeight);
+        }
+    }
+    
+    void start() {
+        isActive = true;
+    }
+
+    void stop() {
+        isActive = false;
+    }
+
+    void reset() {
+        currentFrame = 0;
+        frameTimeSecsLeft = frameTimeSecs;
+    }
+
+    void update() {
+        if(!isActive) {
+            return;
+        }
+
+        frameTimeSecsLeft -= GetFrameTime();
+        if(frameTimeSecsLeft <= 0) {
+            frameTimeSecsLeft += frameTimeSecs;
+            currentFrame = (currentFrame + 1) % numFrames;
+        }
+    }
+
+    void draw(in Vector2 position) {
+        DrawTextureRec(texture, rectFrames[currentFrame], position, Colors.WHITE);
+    }
+}
+
+
diff --git a/lesson#28 - Simple spritesheet animation/ourGame/source/game/data.d b/lesson#28 - Simple spritesheet animation/ourGame/source/game/data.d
index 30be8b4..0783377 100644
--- a/lesson#28 - Simple spritesheet animation/ourGame/source/game/data.d	
+++ b/lesson#28 - Simple spritesheet animation/ourGame/source/game/data.d	
@@ -26,7 +26,7 @@ class Entity {
     Rectangle frame;
     Vector2 position;
     
-    this(in Texture2D texture, in Rectangle frame, in Vector2 Position) { 
+    this(in Texture2D texture, in Rectangle frame, in Vector2 position) { 
         this.texture = texture;
         this.frame = frame;
         this.position = position;
diff --git a/lesson#28 - Simple spritesheet animation/ourGame/source/game/entity/coin.d b/lesson#28 - Simple spritesheet animation/ourGame/source/game/entity/coin.d
new file mode 100644
index 0000000..ccd9988
--- /dev/null
+++ b/lesson#28 - Simple spritesheet animation/ourGame/source/game/entity/coin.d	
@@ -0,0 +1,27 @@
+module game.entity.coin;
+
+import game.data;
+import game.animation.animation;
+
+class Coin: Entity {
+    private {
+        Animation animation;
+    }
+
+    this(in Texture2D texture, in Rectangle frame, in Vector2 position) {
+        super(texture, frame, position);
+        
+        animation = Animation(texture, 5, 0.1);
+    }
+    
+    override void update() {
+        animation.update();
+    }
+
+    override void processEvents() {}
+
+    override void draw() {
+        animation.draw(position);
+    }
+}
+
diff --git a/lesson#28 - Simple spritesheet animation/ourGame/source/game/player.d b/lesson#28 - Simple spritesheet animation/ourGame/source/game/entity/player.d
similarity index 60%
rename from lesson#28 - Simple spritesheet animation/ourGame/source/game/player.d
rename to lesson#28 - Simple spritesheet animation/ourGame/source/game/entity/player.d
index 20c321b..3357575 100644
--- a/lesson#28 - Simple spritesheet animation/ourGame/source/game/player.d	
+++ b/lesson#28 - Simple spritesheet animation/ourGame/source/game/entity/player.d	
@@ -1,9 +1,9 @@
-module game.player;
+module game.entity.player;
 
 import game.data;
 
 class Player: Entity {
-    this(const ref Texture2D texture, const Rectangle frame, const Vector2 position) {
+    this(in Texture2D texture, in Rectangle frame, in Vector2 position) {
         super(texture, frame, position);
     }
     
diff --git a/lesson#28 - Simple spritesheet animation/ourGame/source/game/menu.d b/lesson#28 - Simple spritesheet animation/ourGame/source/game/state/menu.d
similarity index 96%
rename from lesson#28 - Simple spritesheet animation/ourGame/source/game/menu.d
rename to lesson#28 - Simple spritesheet animation/ourGame/source/game/state/menu.d
index 6ccf0d9..a819518 100644
--- a/lesson#28 - Simple spritesheet animation/ourGame/source/game/menu.d	
+++ b/lesson#28 - Simple spritesheet animation/ourGame/source/game/state/menu.d	
@@ -1,4 +1,4 @@
-module game.menu;
+module game.state.menu;
 
 import game.data;
 import game.gstatemanager;
diff --git a/lesson#28 - Simple spritesheet animation/ourGame/source/game/play.d b/lesson#28 - Simple spritesheet animation/ourGame/source/game/state/play.d
similarity index 56%
rename from lesson#28 - Simple spritesheet animation/ourGame/source/game/play.d
rename to lesson#28 - Simple spritesheet animation/ourGame/source/game/state/play.d
index 9652125..cd9a10f 100644
--- a/lesson#28 - Simple spritesheet animation/ourGame/source/game/play.d	
+++ b/lesson#28 - Simple spritesheet animation/ourGame/source/game/state/play.d	
@@ -1,8 +1,9 @@
-module game.play;
+module game.state.play;
 
 import game.data;
 import game.gstatemanager;
-import game.player;
+import game.entity.player;
+import game.entity.coin;
 
 import std.file: getcwd;
 import std.path: buildPath;
@@ -11,19 +12,24 @@ import std.string: toStringz;
 class Play: IState {
     // variables
     private {
-        Texture2D texPlayer;
+        Texture2D texPlayer, texCoin;
         Player player;
+        Coin coin;
     }
     
     this() {
-        texPlayer = LoadTexture(getcwd.buildPath("../../assets/Evil Wizard/Evil Wizard.png").toStringz);
-        player = new Player(texPlayer, Rectangle(75, 75, 125, 125), Vector2(0, 0));
-        // texPlayer = LoadTexture(getcwd.buildPath("../../assets/fire/png/blue/loops/burning_loop_1_144x192.png").toStringz);
-        // player = new Player(texPlayer, Rectangle(0, 0, 144, 192), Vector2(0, 0));
+        // player
+        texPlayer = LoadTexture(getcwd.buildPath("../../assets/spritesheets/player/woodcutter/Woodcutter.png").toStringz);
+        player = new Player(texPlayer, Rectangle(0, 0, 48, 48), Vector2(0, 0));
+
+        // coin
+        texCoin = LoadTexture(getcwd.buildPath("../../assets/spritesheets/coins/MonedaD.png").toStringz);
+        coin = new Coin(texCoin, Rectangle(0, 0, 16, 16), Vector2(0, 0));
     }
     
     ~this() {
         UnloadTexture(texPlayer);
+        UnloadTexture(texCoin);
     }
 
     // inherited from IState interface
@@ -35,6 +41,7 @@ class Play: IState {
     
     void update() {
         player.update();
+        coin.update();
     }
 
     void processEvents() {
@@ -50,9 +57,10 @@ class Play: IState {
         BeginDrawing(); scope(exit) { EndDrawing(); }
     
         // clear background
-        ClearBackground(Colors.YELLOW);
+        ClearBackground(Colors.GRAY);
         
         // draw
         player.draw();
+        coin.draw();
     }
 }