Looking great! Coaster looks awesome and the rock work is starting to come alive. I’d suggest a few more hues of brown in there instead of the one core colour. More 1x4 rockwork to help create a healthy variety of shapes and then some foliage will make that pop. I feel like you’ve got that in hand though.
I really like where this was headed
I echo what J K says. It might be rough around the edges now, but you're not far off making this really good.