It would Really be good if you added a really dark texture to the Sky for day time. Also, it kinda bothers me that I'm not making noise when I walk on blocks. Other than that, I think it's pretty great! I'd love to use it in a story video if you wouldn't mind when it's finished.

is it supposed to have those distorted blocks and dead-looking terrain/items?

Nice, i like it! Maybe add a bit more vibrance to your colors, it's kind of dull in some places, and I can barely see ores.

Too much obviously added noise, some textures are just awful (such as grass). This could be changed easily but still we all start somewhere so don't take offense. Also, good job on not making a simple tecture pack for your first. +1