Quote from AmbassadorArt
Kerblahh, I am having serious trouble with even starting your maps. I downloaded Green Hill, and when I moved the world folder into Minecraft's save folder, it gave me an "encryption error." (I tried pasting the foler and extracting the zip folder that was downloaded, no luck) Eventually I got it in the saves folder but when I played the world I got a black screen along with my health and food bars. I relogged and spawned underwater in a random, unedited world. A shame too, because I wanted CTM maps that aren't Super Hostile, and to see what interesting things this map offers.
Pleeeease see if you can help me out.
Get rid of your mods or download a fresh jar