AegonVI said
And, that canal would be going through a super hilly area...
Through the mountains, as it were... but maybe there's a pass or something it could be dug through.
As for the passage of time in-game, I haven't figured that out yet.
An idea would be to play the game in seasons; each player has, say, three actions per season (troop movement, delegations to other nations, construction, etc). The seasons will be played in three IRL day intervals. Didn't use your actions of the season? Your loss. Or something like that. What do you think?