I like it.
I like the multiple patterns that you used at the top left and right. It vaguely reminds me of Gerald Scarfe. Also sorta reminds me of Cthulu.
Although I do have some suggestions, what would have looked better is if on that multicolored eye thing, those black lines that spawn from it were curved to form the outline, as opposed to the outline just simply being, well, there.
Also those brick walls aren't, straight. It looks like you just drew them on paper, which is nice and all, but we have software that allows us to make straight lines and form perfect cubes at a correct perspective.
The cloud cover in the background is too blurry and underdetailed for me. But that's just me.
Is that your background at the bottom right?