That sand is amazing, but the tall cacti's shadow is pointing in the wrong direction. The light source is top-left, so the shadow should be projecting from the bottom right corner of the cactus.
Your tiles are great. If I may comment though on the tall cacti, they feel kind of blocky in my opinion.They look great but something about the outline with color around the top gives a rather rectangular feeling.
The rock texture is really repetitive, might want to break that up with some additional variance tiles. Otherwise, really good stuff!
I love the way you make the sand texture, amazing! oh iya, salam kenal bro :D