Game Development Reference
In-Depth Information
Figure 12-3.
Belt Commander in action
In Figure
12-3
, we see the action part of the game. On the left is the spaceship controlled by the
user. The user can tap on the screen and the ship will travel up or down to the location of the tap.
This is how the user can avoid the many asteroids that travel from the right side of the screen to
the left. In addition to the asteroids, there are alien saucers that travel up and down on the screen,
shooting bullets at the user's ship. Both the asteroids and the saucers' bullets do damage to the ship
when they hit. The game continues until the ship is overwhelmed with damage. To help the player
along, power-ups appear on the right and travel to the left. If users can intercept a power-up, they
receive whatever bonus it gives: health, more damage, or extra points.
In the lower right-hand side of the Figure
12-3
, we see a Pause button (II). This will pause the game
and allow the user to quit or continue playing, as shown in Figure
12-4
.
