Welcome to the forum. This is a really sweet concept. I especially like the purple-red colors. Two things though that I believe could help the depth in this piece are; if you'd darken the right foreground. And perhaps add something to the left in the foreground, a rock or something. These are just some suggestions. I still really like this concept.
Looking forward to seeing more.
Take care,
-Alexander I
Alexander Isaksson, beginner, 18 years old.
Studying Game development.