Version 4.0 has the following new features
- 4 or 6 player games
- Private games
- 4 different ways to play a card
- keyboard [0-6]
- click
- double-click
- drag-n-drop
- Ability to re-arange cards in player's hand
- Customizable game characters (eyes, hair, mouth, skin, & clothing)
- Customizable sounds, visual options, & gameplay settings
- Chat with cartoon chat bubbles
- Customizable game speed
- Improved scoring (winner gets extra points for opponent's sets)
- Ability to send special commands (help, nugde, boot)