Requirements Priorities

1. Solitiare mode - selected cards move to side or top
2. Visual indicator of correct/incorrect set
3. "3 more" feature
4. Select timer duration (or none) in solitaire mode
5. Display time as a progress bar or something
6. Hint feature (not available in competitive game)
7. Difficulty levels (Easy reveals 2 cards, medium reveals 1, hard reveals none).
8. All one color cards beginner mode (randomly chosen color)
9. Choose window size
10. Multi-player mode
11. Show game settings dialog on starting a new game
12. Scoring system
13. "Explain why" feature
14. Sounds
15. Customizable card designs or themes
16. Select background
17. Hall of fame
18. Applet (solitaire), then desktop application (solitaire and multiplayer), then networked, then mobile