Very cool idea! Maybe this would be even better with bigger 'clouds' of sand swirling around, so you could have two layers (one swirling to the left in front and another swirling to the right in the background). The main issue, in my opinion, is that it reads as a little bit flat. :)
Oh I agree with the flat statement. Still trying to work on colour theory and color selection. Definitely not my strong suit haha. I appreciate the feedback!