From looking at the pic you posted before this, your grasp of anatomy actually seems to have improved! Most of the picture is actually pretty good as well! However, I’d recommend that you look at reference images for how kissing works and for what a skull looks like from the side. That’s the only critique I can give for this, though. :)

I think I may have seen you before somewhere else. I bet you get all kinds of remarks for having an OC shipped with Sans. Don’t pay attention to them. Letting them get you down just gives them power over you. You’re a pretty good artist and you’re allowed to draw what you like. Keep drawing and you might be scouted!