Guidance on designing for 3D printing sites

I’m doing a masters course in 3D printing and as part of it I have to track downloads of a model I have uploaded. i don’t think my design is doing to well, so please can people give me some feed back on what I’m doing wrong, what they don’t like or things they would change

A Giraffe Ornament - with new heart giraffe ornament by DR_Murray - Thingiverse

3D Printed A Giraffe Ornament - with new heart giraffe ornament by DR_Murray | Pinshape