I found the process of discovery (including the ship orientation hints mentioned below) was part of what made it enjoyable. Of course, after about five minutes the rules and strategies have become apparent and it does become truly mindless...
Yeah, after a few minutes of playing and figuring it all out, it's become super easy to do a 15x15.
A timer would be really great to see just how well you can do and to push yourself for better times. I think I've gotten 15x15 to always under 25-30 seconds
