One thing I've noticed is that your image has an extremely high color count, 364 to be exact. From looking at it, it seems like this is because you are using the brush tool, gradients, or some other kind of tool to automatically blend pixels. This is usually frowned upon in pixel art, as it not only takes away your total control over the art (which is very important when drawing things on a tiny canvas!) but also produces noise, which looks imprecise. To improve this, I would try to recreate your art with as few colors as possible. You can do this in Photoshop and GIMP using indexed colors, but it might be more useful for you if you tried doing it manually.

Besides that, it's mostly fine. However, the candles seem a little too small, and most of the background details are a little hard to read. Also, the arm could use some cleaning up, as the lines are forming 'jaggies': jagged, uneven curves.