The contrast as a whole is slightly low, the beam stands out strongly but the building and cliffs suffer from this lack. Also, the choice to have the structure full black while using lighter colors on the darkest shades of the rocks makes them a bit flat, fact only balanced by the nice rendering of the rocks (but would benefit from darker shades).
The composition would benefit from the point of contact between the beam and the clouds being more lowered, centering it more on the piece. With this, in my opinion you could ditch the bottom rocks ground, conveying a more ethereal feeling to the piece.
Also, applying some perspective on the beam, to make it look like it's shooting farther away would help.
Changing the perspective of the beam and gun do provide an extra anti-aliasing challenge, as can be seen by my clumsy attempt at beam AA
Enjoying this style, and this particular work, very much.
