yeah my advice would be to make some more pictures with a beter resolution. the pictures would look a lot better in a not square format. so that would be good. one small advice for chunky if you enable the waterworld setings. your world will have not these strange edges. that would look a lot beter and you can add a skymap to get a more realistic look. also i would recomend that you make some pictures where you see the whole map and not only parts.for the description, i would like to have some more informations about the map itself. ( sice, ores yes or no ).
i hope this helps you to get the attention you should get with this nice terrain