> Why would you say time has a direction, or flow?
Direction: from pas to future
Flow: as your speed/mass increases, your times slows down compared to other objects.
> Space does not have direction or flow.
Direction: space has three (proven) directions, that's why we speak of 3D, three dimensions.
Flow: actually space seems to have a flow, since the universe is expanding. According to latest discoveries, this expansion (called inflation) could eventually lead to disintegration of galaxies, stars, etc,...