Hi There,
I'd just like to start by saying that basically I'm very inexperienced in sound production (I'm only 18!) and obviously my suggestions are only opinions.
Basically, metal isn't really my usual genre of choice, but I enjoyed the song Morphine Killer, the syncopated start is clever but to the untrained ear would be difficult to appreciate I imagine, the melodic lead vocals and backing vocals were a bit different I thought and I liked this. One thing I did notice is that the vocals are a bit lost in the mix from about 0:52 to 1:16. I imagine this would be easy to sort. Also in the song the Hi-hat and crash sound lacks a bit of clarity (bearing in mind this may be due to the fairly bad speakers I'm listening to this through!).
On a separate note, the dynamics seem to be quite similar and unchanging throughout, maybe another guitar could be added (or a different effect employed) later in the song to break it up a bit.
Only my opinion, enjoyed the song though, quite catchy.
James