This is my very first survival map that I made. I've play tested it myself quite a couple times to see if it is possible and it should be good to go.
SkyChunk(save file link) is a map I created from the inspiration of the map Skyblock. Like skyblock, you start out on a floating piece of land and you must attempt to survive. The objectives are in the starting chest in the book. Many of the objectives require skill and patience to complete. If you're feeling really lucky, try out the bonus objectives after you complete all the normal objectives for a tougher challenge.
In order to play the save file, download the zip, open it and send the save to your .minecraft/saves folder.
If you happen to constantly fall into the abyss while respawning, either wait until you respawn on land or change your gamemode to creative and put yourself on land. All the rules and objectives of the save are located in the chest at the beginning.