Graphics: For a large voxel, i.e. minecraft type game, when smoothed, looks really good, when in construction mode, blocky, still looks fairly good.
Sound: Monotnous. At the moment, I've only noticed one track playing which is very ambient. The breathing you get naturally is annoying, but can be tuned out.
Options: There are no real options at the moment, other than resolution, windowed/fullscreen, texture, and anti-aliasing. Definitely a point that needs worked on.
Gameplay: For 3 arks in this game, the first two are relatively quick, and the third part, is just waiting. Overall lack of depth.
Bugs: It is still beta, but I would say it feels more like a late alpha. Lots of glitches to the game. Certain people get horrendous lag in certain areas. Dissapearing items, and such forth.
Overall: I would recommend this game with one caveat, if you want a polished execution of a game, at this moment, this is not the game for you. But, if you want to have some fun, in an adult form of minecraft, this game could be worth your while. Overall, if you are not sure of the game, I'd wait a while till you buy it, but definitely keep an eye on it