I've only played a few minutes of the game, but first impressions are important. I'd suggest you change the basic tutorial so that at the end, you aren't kicked out automatically. Instead, let the battle end with "Battle is over. Would you like to stay? Y/N"

That would allow players like me, who just want to drive the ship around for a while the chance to well, just drive the ship around for a while. Throw in a few target ships and maybe a small island, and suddenly the tutorial is transformed into a sand box for newbies. Personally, I could spend a long time in such a sand box, getting used to targetting things while moving, changing speed, etc. Just make sure there is a way for me to exit when I'm finally ready.

You'll probably be hearing a lot from me in the next few days. I tend to make a lot of suggestions on all games I play, but I do try to limit them to things I think would be easy for you to do.