Content wise, it looks cool to me.
The first thing I notice about it though is that the brightness/contrast looks a little low. Everything looks quite grey, like the brighter colours have the potential to pop out at me more.
Is this deliberate? eg I might do this if it's a background image for something over which I'm going to place brighter content, like text. But that would be one of the only times I'd want this greying or darkening of the whole image.
Other than that though, good job so far - it's suitably busy for a battle scene. It might want a couple of smaller explosions on the very distant ships for some depth and scale, but maybe see what looks good to you. Too much could make it too busy, I dunno.
One last thing - the clipping of everything 'outside' the ship, in the sections of window could do with tidying up. Especially the laser beams passing 'behind' the frame of the cockpit, as they look like they're inside the cockpit with us.