To start a new game:
1. Select "Play" in the Main Menu.
2. Select "Single Player" (for Multi Player see the Multiplayer section).
3. Click on the map shown to display available maps. Click on the desired map.
4. Choose the level of difficulty (Casual, Hardcore). You can read more on difficulty levels in section How to Play.
5. Press “Start new game" to launch the selected map in the single player mode.
Note that there is only one save-game, starting a new game will erase all progress you have from a previous game. The current Beta version has one save-game per map.