Great game but it would be even greater with mechanical engineering like gears and water-wheels(once water is implemented) wind-wheel etc.
I just thinking of you know little competing with Minecraft and its all mods
like electrical age mod and BiblioCraft mod and such.
if it would had been implemented in the game it would function better and make it twice as fun and good in survival perspective,
with gears it could be basic way to get power or move things and so on.
*With BiblioCraft I mean Writing books, make logs and place them on a shelf