Challenge 2 - Play Fetch - Unity Learn

Challenge Outcome: - A random ball (of 3) is generated at a random x position above the screen; - When the user presses spacebar, a dog is spawned and runs to catch the ball; - If the dog collides with the ball, the ball is destroyed; - If the ball hits the ground, a “Game Over” debug message is displayed; - The dogs and balls are removed from the scene when they leave the screen;