DONGEON AND DRAGON REPRESENT!!!
it's funny how you draw really well some parts, and the exact same counter-part is less well made.
Example = His left feet (right for us) is much better then his right feet (left for us)
same thing with the human arms, the right one (left for us) is much better then the left one (right from us).
All that creates a huge disbalance for the whole drawing.
The tank is okay, quite a blurry picture though.
Now tips =
1# = when drawing hands, use your own as a reference, or even take a picture with your webcam and then redraw it... (I often do that myself
)
2# = try doing more shadows, I see you've made a few, but that isn't enough, the more you get yourself into drawing shadows, better you'll get at it and more observent you'll be as well! so it's a win win! situation!
3# = if you own some clay or plasticine (even those for kids) I would suggest you to make yourself some fast sculptures to understand the positions of your different elements. For example, your horns = following your drawings, are not even at the same level, one seems to be on the top of his forhead, and the other one in the back of his head.
blablabla, great drawing! good skills, but there's A LOT of room for improvement ;D