NES Cave mockup

[DatMuffinMan]

Decided to have another go at NES things, and so I started a cave mockup. I think I'm getting the hang of platform tiles, but I still need to add more things to make the environment interesting, and that's what I need help with. I'm not sure what else to add besides variations of the rocks, although I want to have a kind of transition between the black inside of the cave and a blue sky (same palette as the waterfall). Any help with this would be great

Tileset thus far -


If what I wrote about the cave-sky transition is hard to understand, what I had in mind was something along the lines of the darker bushes in Indigo's mockup - http://www.danfessler.com/portfolio/pixelart/skid_mock4.png

[surt]

I'd keep the opening of the cave simple: just a silhouette with stalactites/gmites.

For interest you could add evidence of use, mining paraphenalia, ruins of ancient civilizations, skeletal remains of gigantic beasts, etc.

[DatMuffinMan]

Thanks Surt, that mockup gives me some ideas. At what point do you start copying and pasting the stuff together as a scene? Added some more tiles and edited a couple previous ones -