The artwork seems really nice, and fits the theme of the game really well. My only recommendation is perhaps make the text a sky orange and replace the blue spread with a light yellow to signify the effect the sunrise has in your icon/thumbnail (Due to the text being underneath the sunrise.) though it’s completely up to you, it looks wonderful both ways. And lastly, a character standing, watching the sunrise while riding his/her horse would give it a more ‘Desert’ themed. (Picture attacked below.) I really like the detail you had put in the artwork, excellent job! !