Like every game, Balls Out!
is made out of several objects that may or may not have their own life, of course, only if you code them to have a life. So which objects are part of the game?
In this game we will use only three layers (groups):
Background
Game
Title screen
The background layer will hold some info text and simple, colored rectangles. The title screen is just that with two extra buttons to start a game or to leave it completely. And the game layer will hold the main game objects, such as the balls, the enemies, and the tiles. Also, the particle effects will use the game layer. Just as a little reminder, with layers you can group sprites to handle them in one batch. Layers also control the order in which sprites are drawn.