Sorry forgot to explain in the tutorial:
you can move the camera with WASD
after moving a unit you need to either giuve the command to attack or letf click on it to just end the action
also to cross the river you need to go to the tiles that are cyan/ligther tone of blue, they are the shallow parts of the river and they are crossable, in gnereal the rival is like an unpassable terrain.
rigth click also undo the movemen of a unity, but not after you end your actions with them.
sorry for the mistakes, I had to rush the end because of family reasons