Use wsad, hjkl, or numpad keys to move around the area. Terrain tiles visible will be bright, seen ones will be dark, and never seen ones black.
You can change the Field of Vision algorithm from the Fov menu.
Use the t key to bring up the throw interface. Use the movement keys to move the target (X) around the area. If reachable, it will be yellow, if unreachable, red. The path to the target, as far as possible, will be highlighted. Press t again to get out of throw mode.
Use the Los menu to change the Line of Sight/Projectile algorithm.
Note: The Shadowcasting Los algorithm is buggy, I am trying to fix it.
Use the b key to bring up the breathe interface. This is basically a Cone Field of View interface. Use the movement keys to move the target(X) around, the affected area of the effect will be highlighted. The breathe cone angle is fixed, you can change the algorithm using the Cone Algorithm menu. Press b again to get out of breathe mode.
The area is full of walls (#) and grass (.). There are a couple of dragons to keep you campany. There are no combat, etc yet.
Hold the mouse pointer on a tile to see its description.