You could really benefit with there being many more of these mines - if just the one then it doesn't fit well into the composition. There's a lot of space in the image and it happens to be behind your character and it makes the composition look a little awkward (referring also to your statement on it changing her silhouette). I also agree with 3dc in that it could do with having a bit more atmosphere between that and the character.
Green strands on the pink? blend between the two? too hard tbh for me to pick which would be best but if you wanted a solid color for the hair, green oddly enough is standing out more atm.
Went for green, although will try pink again at the end just to make sure.
@3dc Alt hair. Still not totally sure.
Nice, the mob guy somewhat floating seems a touch odd to me, it looks like he was just thrown in (the water) and idk if mob guys and pirates where in the same time-frame. (love the idea though seems like a fun active time frame.)
Him floating in place though (idk if cement does that over time?) maybe put something under him or make it feel landed in the scene. (please keep in mind i don't do this stuff i am just suggesting what might look good to help you finish it up, otherwise) this is looking better and better.
@3dc She's meant to be hunting drowned souls for Davy Jones, so I'm just going through all the types of underwater dead I can think of. (She's a punk in a leather jacket with dyed hair and a metal t-shirt so I'm hoping people think it's set present day.)
I'm going to add more lost souls in the background time / room permitting, just wanted to get the focal bits done first. The cement shoes guy I was thinking could move around despite encumberment like other ghosts. I can always just stick a bit of rock under him if it's confusing.
Other underwater undead ideas from anyone would be appreciated.
Really like your palette colour !
Keep it up.
Basically finished now I think, just tweaks and stuff to go. Critique still appreciated.
Really love the skeleton's expression, you really nailed it on the head! Composition is really good, colours are nice and the general tone is done really well. I think it could be a bit darker as it's the ocean but the lighter mood suits the comedic aspect quite well
Ok, you are definately crazy, I like that!
Nice work man! Congratulations on finishing your piece. The harpoon gun looks awesome in the final render. ^^
I didnt expect enter and see a the metal punk ajolote unicorn centaurish creature with an harpon, but here we are, you nail it
Congratulations on getting it done, a lot of complex things going on, your champion design is pretty bomb xD
We have the champion for the best sentence on Artwar 4 here 
And the worst, I totally agreed 
Best of luck and see you next year, I guess ?
"Ajolote!" I've learnt a new word today.
Thanks for the comments and to all who helped out with their critiques.
