All with the ink tool.

two words...sweet, jesus.

wow.. insanely.. good..

real good drawing m8! here is somthing i did whn my wacom was new:

done wt airbrush tool

artrage test

The shadows are way off.
The item on the left, suggests that the light is coming straight across, left to right.
The person suggests that the light is coming from the left side, angled towards the ground.
The pipe suggests that the light source is higher up.
The egg sac thing suggests that the source is coming straight on.
And then the visual lightbulb is above all of them.
gg

Look, I basically scribbled this. It's exactly what my classroom doodles look like, FYI.

I'm not trying to insult, but you could improve a lot if you fixed the light source.
While drawing by hand, try to visualize a lighting point, and ray of light hitting the objects, and then estimate where they should be. The more you practice, the more accurate you will get.

I think that the off light source just adds to the confusion of it which makes it better , fun scribble entertaining to look at. And also the egg sack could easily come from the same light source as the person. 10/10 for being, fun, creative and making no sense at all :P. Also I like the bending walls and the window. Edit again, who says the lightbulb is on?