diff --git a/resources/soccer_ball.aseprite b/resources/soccer_ball.aseprite
new file mode 100644
index 0000000..3a418fd
Binary files /dev/null and b/resources/soccer_ball.aseprite differ
diff --git a/resources/soccer_ball.png b/resources/soccer_ball.png
new file mode 100644
index 0000000..e04c69e
Binary files /dev/null and b/resources/soccer_ball.png differ
diff --git a/source/ball.cpp b/source/ball.cpp
index 2bed89e..75c2a28 100644
--- a/source/ball.cpp
+++ b/source/ball.cpp
@@ -1,5 +1,4 @@
 #include "ball.h"
-#include "defines.h"
 
 // Constructor
 Ball::Ball(int x, int y, int w, int h, int vx, int vy, Texture *texture)
@@ -13,8 +12,8 @@ Ball::Ball(int x, int y, int w, int h, int vx, int vy, Texture *texture)
     sprite = new Sprite(texture);
     sprite->setPos({x, y});
     sprite->setSize(w, h);
-    sprite->setClip({0, 0, 24, 24});
-    color = {255, 255, 255};
+    sprite->setClip({0, 0, w, h});
+    color = {(rand() % 192) + 32, (rand() % 192) + 32, (rand() % 192) + 32};
 }
 
 // Destructor
@@ -69,7 +68,7 @@ void Ball::update()
 
     if (collision)
     {
-        color = {rand() % 255, rand() % 255, rand() % 255};
+        sprite->setAnimationSpeed((rand() % 15) + 5);
     }
 
     // Actualiza la posición del sprite
diff --git a/source/defines.h b/source/defines.h
index e6a118d..666a295 100644
--- a/source/defines.h
+++ b/source/defines.h
@@ -1,10 +1,19 @@
 #pragma once
 
-#define SCREEN_WIDTH 320
-#define SCREEN_HEIGHT 240
+#include "SDL2/SDL.h"
+#include <stdlib.h> /* srand, rand */
+
+#define SCREEN_WIDTH 480
+#define SCREEN_HEIGHT 360
 #define NUM_BALLS 100
+#define BALL_SIZE 36
+#define NUM_FRAMES 4
+#define BG_R 96
+#define BG_G 96
+#define BG_B 96
+#define TEXTURE_FILE "resources/soccer_ball.png"
 
 struct color_t
 {
-    int r,g,b;
+    int r, g, b;
 };
\ No newline at end of file
diff --git a/source/main.cpp b/source/main.cpp
index c5c9798..910e1bc 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -1,4 +1,3 @@
-#include <SDL2/SDL.h>
 #include "texture.h"
 #include "ball.h"
 #include "defines.h"
@@ -54,13 +53,19 @@ bool init()
 
 	event = new SDL_Event();
 
-	texture = new Texture(renderer, "resources/pelota.png");
+	texture = new Texture(renderer, TEXTURE_FILE);
 	for (int i = 0; i < NUM_BALLS; ++i)
 	{
-		ball[i] = new Ball(rand() % SCREEN_WIDTH, rand() % SCREEN_HEIGHT, 24, 24, 1, 1, texture);
+		const int vx = rand() % 2 == 0 ? 1 : -1;
+		const int vy = rand() % 2 == 0 ? 1 : -1;
+		const int x = rand() % SCREEN_WIDTH;
+		const int y = rand() % SCREEN_HEIGHT;
+		const int size = BALL_SIZE;
+		ball[i] = new Ball(x, y, size, size, vx, vy, texture);
 	}
 
 	ticks = SDL_GetTicks();
+	srand(time(NULL));
 
 	return success;
 }
@@ -106,6 +111,19 @@ void checkEvents()
 			shouldExit = true;
 			break;
 		}
+
+		if (event->type == SDL_KEYDOWN && event->key.repeat == 0)
+		{
+			switch (event->key.keysym.sym)
+			{
+			case SDLK_ESCAPE:
+				shouldExit = true;
+				break;
+			
+			default:
+				break;
+			}
+		}
 	}
 }
 
@@ -124,7 +142,7 @@ void update()
 
 void render()
 {
-	SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+	SDL_SetRenderDrawColor(renderer, BG_R, BG_G, BG_B, 255);
 	SDL_RenderClear(renderer);
 
 	for (int i = 0; i < NUM_BALLS; ++i)
diff --git a/source/sprite.cpp b/source/sprite.cpp
index d1d4aa5..5d00818 100644
--- a/source/sprite.cpp
+++ b/source/sprite.cpp
@@ -7,7 +7,7 @@ Sprite::Sprite(Texture *texture)
     pos = {0, 0, 0, 0};
     clip = {0, 0, 0, 0};
     frame = 0;
-    numFrames = 3;
+    numFrames = NUM_FRAMES;
     animationSpeed = 20;
     animationCounter = 0;
 }
@@ -64,4 +64,11 @@ void Sprite::animate()
 void Sprite::setColor(int r, int g, int b)
 {
 	texture->setColor(r, g, b);
+}
+
+// Cambia la velocidad de la animación
+void Sprite::setAnimationSpeed(int value)
+{
+	animationSpeed = value;
+    animationCounter = 0;
 }
\ No newline at end of file
diff --git a/source/sprite.h b/source/sprite.h
index 761dc45..d57dfd6 100644
--- a/source/sprite.h
+++ b/source/sprite.h
@@ -1,7 +1,7 @@
 #pragma once
 
-#include <SDL2/SDL.h>
 #include "texture.h"
+#include "defines.h"
 
 class Sprite
 {
@@ -41,4 +41,7 @@ public:
 
     // Modulación de color
     void setColor(int r, int g, int b);
+
+    // Cambia la velocidad de la animación
+    void setAnimationSpeed(int value);
 };
\ No newline at end of file