Bubble Burst - Lesson 2: Options screen

Today is the turn for the game options.

Options Screen 
- Mode: The mode we want to play a game. We can choose between Arcade (Burst blue, green or gold bubbles to earn points), Challenge (Burst the selected bubble to earn points) or Endless (Works like Arcade mode but without time limit).
- Time: Indicates the duration of the game. No time limit if we choose "Endless" mode.
- Background: Here we can select the background image for the game.
- Music: Here we select the music for the game. If we launch Bubble Burst with a music playing in our iPhone or iPod Touch, we can play the game while we hear our own music.