Screens and Transitions

Since you have already implemented help screens and high-score screens twice, in Chapter 6's Mr. Nom and in Chapter 9's Super Jumper, you can refrain from doing so for Droid Invaders; it's always the same principle, and a player should immediately know what to do once he or she is presented with the game screen, anyway. Instead, add a settings screen that allows the player to select the type of input (multitouch or accelerometer) and to disable or enable sound. Here's the list of screens for Droid Invaders:

• A main screen with a logo and Play and Settings options.
• A game screen that will immediately start with the game (no more ready signal!) and also handle paused states, as well as display “Game Over” text once the ship has no more lives.
• A settings screen that displays three icons representing the configuration options (multitouch, accelerometer, and sound).

This is very similar to what you had in the previous two games. Figure 12–4 shows all the screens and transitions.

Figure 12–4. Screens and transitions of Droid Invaders