What I meant is that you should have in mind the materials things are made out of when pixelling and apply that knowledge to your stuff.
For example, rock bricks, unless polished and being gem-like, they wouldn't be so shiny and blurry like yours. Look at some references:


Now, do your blocks look anything like that?
Also, what I meant with the off angle was this:

I couldn't read what they are meant to be when looking at them, so I guessed they were the bottom side of the blocks.
Anyway, if you still don't understand, I can explain it in Spanish next time, if that's better for you.