Not as much a mod. Possibly a mod pack edit at the least. Not even for sure what all it would take to make it a reality.
A sky island pack where block interaction is stricter then adventure mode. You can't place blocks, harvest blocks, craft, etc. You can't even damage mobs with any tool. It uses computers for everything. You start with a tree, a platform, possibly a starter chest, and a robot from a computer mod, and any upgrade the robot might need to accomplish tasks until more robots and upgrades can be made.
It is to test ones mettle in programming/using computers. If constructed right it could work as a guide in teaching moderate to advanced programming tasks. It would have a Save won state after defeating the Ender Dragon (the end would gen as normal for this challenge(just putting this in there as I have had this game since before the end was added and just now beat the Dragon(with a little of my brother's help))).