A small problem with the ceiling coloring next to the lamps on the background, should fix that. Same thing with the end of your canal, it's blurry, you should make a clean edge there. With the first lamp, darken the edge between the lamp cover and the frame. It's now white and looks a bit weird.

Kudos for not duplicating all the flames. You could add some nice reflection of the fires on the water or on the pillars. And maybe give its some yellow/reddish ambient light colour. Also check the masking for the water on the back, it covers some of the canal edges.

Gonna postpone my vote if you decide to update, nice concept here with a bit more work.

Cheers for the critique. Will try and update according to your suggestions.

Have made a few of the changes, don't think I will have time this week to mod it more though.