I think you’ve done a very nice clean job there. A few images would be good, to add a bit of extra interest. Also I think the header is a little bland.
Perhaps you could do without the orange comment feedback alongside the date (as you also have it lower down each post), and possibly strengthen each post title in comparison to the post date, which is very prominent.
Another suggestion is to strengthen the orange and green colours, as on my screen they look quite faint.
But as I say, a nice clean look.
ps: I looked again, and there’s something strange going on in some of your footers, in some cases a fatal error.