ooo but you should do more one layer art!!!
When I started doing it it was a pain in the ass, but after a while you get really good at it!! And if you wanna paint or do a painty style it's great for that too!
(Sorry I get excited about one layer art haha, most of all my draawings are on one layer and I always want to encourage one layer art haha)

but anyways! This is really cute, and I think you did I nice job. I especially like the hair. ^u^