Love the blend of styles! Ideally, one day, I will figure out how to mix lines and painting similarly :).
I don't know how far you intended to go with this, but I would suggest the reflection doesn't make sense, and the parapets don't match the high quality of the rest of the scene. It's clear you're pushing anatomy, and +doots for that! However, I don't believe she's actually riding Yoshi -- the creature shouldn't be transparent, regardless of intent. If you intended to show more behind, I would suggest expanding the canvas to a wide format and letting yourself go :).
Since you recently argued in favour of accuracy on my thread, I feel these comments are reasonable? But holy crap, great work, this is awesome :).