I found a "glitch" were if you dig too far then there's a giant void.(WARNING:I made the grave mistake of jumping in it, and I DID NOT RESPAWN i literally had to hit ctrl+alt+delete and open task manager and finally close the app.)
Yeah that will happen in a basic "Just Voxel Based Engine" that you can only pick up and place! He should add more stuff to it cuz this has potential to be a bigger game! And I'm all here and for this developer, I would pay and back this project up if he does decide to do more! :)