I'd say it's a good challenge to tackle an illustration with multiple characters like with various poses like in this illustration. So good job!
I'd say there's two main things that I've noticed that could maybe improve it.
First of all, I don't know if you used reference for the different poses, but some of the anatomy looks a little bit off a times. Like the back of the hand of the guy left seems to be almost facing us, but with the way the arm is position that would be a very uncomfortable position to have it. Also the other guy on the foreground right (sorry I don't exactly know all these characters ) seems to me like he would have a very short torso with the way the legs connect to the body. So I'd recommend finding reference of similar poses or even take your own if you can, just to make sure that it all looks okay.
Next would be the lighting. It is a night scene, but it doesn't really look like it because it's pretty bright overall. I think darkening everything a lot and bringing back the highlight from the fire would sell the night aspect much better and would make the fire look brighter and warmer by comparison. And then you can also bring some highlights from the moon on the characters to make them pop even more.
So that's all I can think of right now. It's nice that you challenged yourself with this piece and I hope you'll keep it up