Okay I'll say it. It looks awful. But I'm sure a lot of people said that about Minecraft initially and that turned out pretty good. Only thing I can't really get past is it looks worse than Minecraft and is clearly using Minecraft tech judging from the wooden blocks, crosshair, etc.
Still, they're prototypes and we don't know how it plays. So I'll reserve full judgement. Just not sure these screenshots were really worth releasing.
"You don't get what you deserve, you get what you get."