Guys
Thanks for your input.
1) My tank size is 14cm x 8cm x 8cm
2) Initially my plan is to have just 3 rocks. However, as I didnt secure the moss, it started to float up thus I threw in small rocks to secure the moss
3) I think with 3 rocks, the scape will look more define.
4) Yes, gravel..haha! I took care of everything but miss this out. Thanks for informing me, I think I need to smash them into small grains.
5) Will be doing some improvements this weekend. Thanks!