Hey, imo you really excel at drawing animals and i have no critique for how you draw them at all really, but i do think you don't draw human anatomy as well (like with poses). For example, in the first picture her legs are too low down to match the angle they're bent at, here's a random picture i found on google of someone in a similar position that could help with the posing :
HERE
In the first one the perspective also seems to be a bit off too, with the buildings being too close to the characters and too big. I don't really have any tips on improving that because honestly I can't do perspective at all myself... im afraid you're gunna' have to find a tutorial or something online, or maybe you could go outside and take your own photo of the pavement and buildings as a reference picture to compare it to your drawing