Gm
GameMode. Valid values are:
- MODE_MENU 1 Menu is being dispalyed
- MODE_DEMO 2 Demo is being played back
- MODE_GAME 4 Game is running
- MODE_EOL 8 End of Level has been signaled
- MODE_TYPE 16 User is typing chat message
- MODE_RESTART 32 Level is restarting
- MODE_SENDTOWHOM 64 Choosing who to send message to
- MODE_END 128 Game is ending(exit main game loop)