one part that is bugging me a little is the angle of the bed frame that runs parallel to the floorboards...and the fact that the floorboards get considerably wider as they get closer to the "camera". Shouldn't that chosen perspective effect the bed (and carpet) more noticeably?

I am curious what others think

it seems odd to have so much shading on the handle which abruptly stops when it reaches the end sections. I also don't think the hands/fingers would cast that kind of shadow on the handle, especially considering the bright  lighting on the upper most section of the ends. The black line around the spanner is causing a few issues too, because your light source is above yet the lines imply shadows in areas that wouldn't have them.

it's making my head hurt figuring out where you chose to have the light source 

her hair suggests it's above and to our left, but the spanner suggests it's above and central in some spots, while in other areas it's directly in front of them both.

not sure about the rules here but a NSFW (not safe for work) warning might be nice, as loading indecent "images" of children is likely to get me in trouble even if it's probably not a sackable offence. I am allowed to use the internet at work for personal use to a certain extent so I'm only partly responsible

but anyway, I really like the artist H.R.R Giger but curious if I can post "anything" by him

for those who don't know his work, he's probably best known for his work on the "Alien" movie franchise including set design for "Prometheus", a more recent spin-off movie. Below is one of his paintings I like.

I think the white rectangle is a hole. But it is a little strange that you don't see his hand behind it.

Ahhhh I completely missed that. So the gun should be holding the lower handle really.

the right arm (robot's left) could be a pixel or two to the left and then angled accordingly so the hand reaches the handle. The entire perspective of that shoulder pad seems wrong, as part of it should be in front of the robot's chest. I think the size and heavy shading is what makes it look like it's not set in front really.

I guess it could be the other shoulder that's "wrong" though

anyway I'm still learning like everyone else, so if anyone thinks I've called it incorrectly, feel free to educate me too haha. It's certainly easier for me to judge other people's work than it is to make something comparable.

I don't think his boots would be a single pixel, and it makes him look like he's walking on hooves. The proportions look a bit off too, like the arms and body appear to be longer than the legs, so the belt looks like it's in the wrong position.

Another issue is the sword which looks like it's at the wrong angle just for convenience.

ps: I see you already corrected some of those issues in the other version you made