Just played the tutorial on a Samsung S5.
Back button - pressed it to close the first pop up in the tutorial and it ended the game and dumped me back to the main menu. 50/50 whether or not I walked away at that point. Be a lot better if it worked like close (or did nothing on the map).
Hard to deselect armies. Clicking around didn’t seem to do it.
Having picked one army out of a stack, getting to a second one seemed tricky. Eventually found followers.
Move seemed to change half way through the tutorial - from single hop to a multi hop thing I had to hit save to get out of.
Would be better if the time jumps were animated - give more a sense of planning and then executing moves. As it is enemy forces just seem to jump around - the game is a story and the jumps are narrative breaks.