Endurance Onslaught 6.0
The zombie head was done nicely but,
On its forhead[ and the upper part] it looks like you just shaded and added colors randomly.

Also, the lines on the forhead aren't needed.

7/10
looks good but i guess a few scratches on the head wont hurt the top of head looks too bold and empty to me
p.s./offtopic: i really dont know y u need others to make u a concert poster u should manage fine on urself, seeing u can make such good quality art