You are trapped in adventure mode and cannot break or place blocks, with just your turtle you must survive.
This is a simple mod with a simple concept, use you can only use turtles and computers to interact with the world. I thought about trying to disable player interactions for crafting tables, chests, furnaces, etc but didn't want to make this mod too crazy hard. If you want an extra challenge you can impose that restriction as well. Also if you'd like to add a little extra challenge at the start you could throw out the diamond pickaxe.
This mod obviously uses CC: Tweaked but it also includes 2 peripheral mods (Advanced Peripherals and Turtlematic).
Here are all the relevant docs you will need
