Object Oriented Design

Example: An Educational Game (Requirements)

The game has four difficulty levels:
- Level 1: full hours.
- Level 2: 15 minutes intervals
- Level 3: 5 minute intervals
- Level 4: all possible times (1 minute intervals)
When the player scores 5 points the game automatically advances to the next level.
The game begins by asking for player's name and starting level.
After every round the player is asked whether she wants to play more.