Really cool animation! For a second Spine animation, this is amazing! Congrats!
If you want to improve it, there are a few polishing tricks you can do.
First, always start with the hips. Its a good practice to try to get a circular, or figure-eight motion in the Idle animations. So your hip bone doesn't just go up down in a straight line. It can be really subtle.
Second, offsetting the body parts. So your legs are just following the hips. Right now they are moving parallel together. Try to delay one leg for example, and change the pose slightly.
Third, the secondary animation like the eye. Try to make different timing. Right now it is moving the same rhythm as the whole body. Try to vary this a little.
The same goes for the overlap and follow-through animations like the headband and the chains around the arm.
Try to think of it as they are made of different material, the force of the character moving will influence them differently. For example, the headband will not move the same as the chains around the arm.
Overall you have a great thing going on here! I'm loving the art style and pseudo 3D is great!
Hope this helps,