Nice use of a limited set of colours, the background is really colourful and has a mural feel to it.
The criss-cross drawing lines on the character aren't necessarily bad but i think they should've been erased or at least cleared a bit so there'd only be one line through and through.
Also, this is just nit-picking but i feel like the strand of hair in front of her face should've either gone down to her cheek or not be there at all since it makes it look like that's what's making her wink, unless that's what you were going for from the start.
Nicely done nonetheless.