I sucked at the game :D But it was nice, the music was I don't know... melancholic? It definitely set the mood correctly. I run out of bullets at 2nd enemy, and only read that you can punch them in your comment here to one of other commenters and had to try it again, I guess I somehow was not aware of that on my first try. It was hard, but I somehow liked losing. For me (although a relatively recent, 3-year-old laptop) the game only lagged during loading something new (like particle effect, shader when changing light color in a room or sound during shooting I think?), and after a while it was running smooth.