I don't know why everyone is complaining about there being no instructions, I just started doing what i could and it should be really easy to understand.
Really great concept for this game but very unbalanced as of right now. At the beginning you have 1 or 2 rows, where literally no enemy is in sight and then suddenly your men burst the enemy lines and suddenly you have like 20 enemy ships at once to deal with, trying to learn how to type in numbers and then the corresponding letters. I just won the game because my army has advanced far enough already to win without dealing with those ships and enemies at all.
My suggestions are that you either make everything slower, so you can actually kill off every enemy 1 by 1 or you create some difficulty levels for everyone, so they can learn how to morse slowly but steadily.
I think this is actually a great way to learn morse, which I am interested in, but like I said, the difficulty curve is from easypeasy to OH GOD, WHAT IS EVEN GOING ON, I BOMBARDED MY SHIPS ACCIDENTALLY. Another good thing might be deleting commands from before, but it might become a bit unrealistic.
Overall, I like it and I would like to play it more to learn from this game, but the things mentioned can be improved. :)