I don't think I would change a thing about it. It looks like a lovely portfolio piece to me!
@allysa I really love your concept and story, and it already looks amazing! But since you asked for feedback I will give you some things that I would do.
First I would make the sky going from light to dark a bit less, because of the high value contrast between the mountain and the sky, my eye kinda gets distracted by it. I would also darken the group of chameleons (except the one peeking to make the viewer still look at that) with some dark blue because the values structure there is also pretty high in contrast. What I mean by that is that the darkest value of the group of chameleons is almost pure black and the lightest is almost pure white. This gives a really high contrast, and high contrast askes for attention. I think Tyler Edlin has some great videos about this on his youtube channel but I can't remember which one, sorry. 
Secondly, I would add more saturation to the colours of the chameleon and comet, I feel like they are a bit too desaturated and by adding more saturation, it will emphasise the story even more. And I just like saturated colours but this is probably just a personal preference. 
I would also add a linear dodge layer with a dark red on the comet to get a nice purple glow to it as well.
And thirdly, I would add some tree trunks or something on the foreground. It feels a bit empty to me and this way you can lead the eye a bit more since now the comet is leading the eye of the page.
Hope this isn't all too much, but I made a quick paint over for you to clarify what I mean. I might have overdone it a bit though. Hope this helps! 
