Advice from a Caterpillar

I can't help it, that this guy reminds me so much of the Caterpillar of Alice in Wonderland. Maybe I just drew him that way by accident or it's the hookah and the antennas... Oh well. The character is Elvis and he's *Unikeko's property and I drew this, 'cause it's her birthday~! Or at least was, about a week ago... I suck :c I'm so slow. And it took me ages to get this done, because I wanted to draw something awesome, since she's so awesome too. Near the end I just wanted to start over again, but I would've never get this done if I'd done so, so... here it is. I hope it's not too dark, that there's at least something to be seen... Tried a different approach on the smoke, since I accidentally got rid of my photoshop for a while and I'm still trying to get a hang of SAI. And also, inspired by Unikeko's livestreams I tried to make the pic grayscaled first and added the colours later. I kind of like the technique, since I usually struggle to get interesting contrasts' to my pics and this way it was a bit easier. But I'm rambling, so I'll just stop now.