I'm glad you enjoyed the art, it was all produced by a mysterious artist I am collaborating with. I am rather pleased with it as well.
A tutorial is a good idea, I hope to have one soon. I always seem to neglect the tutorialization of my games.
I have also contemplated a single player mode, I shall likely implement some sort of decision tree based A.I. to play against in a campaign mode. I've also contemplated a matchmaking system for those too shy to host their own lobby or jump in to a stranger's lobby, but in the meantime I would be happy to play with you personally if you are up for it. I am in the PST time zone, and will gladly make myself available any time after noon until the late evening. I am surprised to see that New Zealand is not so far ahead, I suppose the pacific must not be so large as I had imagined haha.