hi helen, I just played a little bit of the game. I also completed "Surf Lem". "Surf Lem" is actually the 10th and final level of the Beach Tribe. So after finishing this level, there won't be another level after this one. Each Tribe has only 10 levels. That's why it won't list the next level; Because there is NO next level after this one
in the beach tribe. Also when one completes the last level in each tribe it will say "Award Me". And one can save the game even after completing the tribe.
I saved the game after finishing the beach tribe, getting the piece of the Talisman, exiting and reloaded the saved game. And it does still show that the beach tribe was completed(part of Talisman gotten).