I feel I started the game very well as black, creating a thick wall while my opponent crawled on the second line. I ended up losing by about 10-15 points in the end. Though there was a white corner group that I think should not have lived, but I did not managed to kill, and that alone would easily reverse the outcome.
I am interested in any general useful critic throughout the game, as well as the possibility (or illusion?) of killing that white corner group.