Shulker Boxes is a feature in the PC version of Minecraft. It is likely to be introduced Pocket Edition in the near future, since we now have shulker in version 1.0.0. This Supplement replaces the mob sulker sulker boxes that can be used to store items. But since You can get these boxes only using the spawn egg, it's honestly not something that would be useful in survival mode.

The purpose of this map is to complete 10 levels of parkour, and die. There are no safe points, so most likely it will be extremely difficult. The developer has tried their best and did a really, really tough conditions for survival. The amount of CP is reduced to one half of the heart, and it means that only one wrong step you could die and have to start all over again.