I like the amount of detail you put into this piece. That being said, there are a couple places where things get pretty dark/hectic with the linework you have, like in the clothes of the center man, or in the chandelier. It might strengthen your piece if you lightened that up/took away some of the linework, so we can appreciate the detail you've put into the forms.
I LOVE how you're working with the color of the line work in the walls and in the devils on the walls! That tonal way that you're playing with linework is great! I think it would be really awesome to see some of the areas be nice and light and vibrant! Just how you are doign it with the devils! Those characters are really nice and it would be great to see their linework lightens so they pop out from the dark background even more. I do like your jewel-tones in this piece - it helps make it feel like it's from the days of olde!
some of the brush textures you added in seem a little rushed. for example, the dark streaks on the floor look like they are colored in around the figures. it might look better if you isolated the floor areas with a masking technique, and then add in the brushwork. This way the strokes will flow more realistically "behind" the figures instead of flowing around the in-between areas.