Got a game going yesterday, on a large world made up of big islands. Things were going well for a while until I noticed that there was not a single beach on my island, and no Earth Shards (which seem to be a prerequisite for the Raise Land spell). I was therefore completely stuck there. I kept playing anyway, just to practice town development and spell research, and ended up scoring a (rather cheap) victory by researching every spell.
I assume that this is some kind of bug, right ? Or are there other ways to get off islands (other than ships) that I don't know about ? Also, I had managed to research every spell available in under 250 turns. Isn't that rather short ?