A 3D incremental miner. Excavate a solid cube of up to ONE TRILLION voxels by hand and by drill, spend the haul on upgrades, then prestige into a bigger cube.
A cube sits in front of you, ranging from 1,000 to 1,000,000,000,000 voxels. Break it.
Starting with breaking single voxels, earn ore which you can upgrade your clicks into larger blasts.
Use drills to automate the cube breaking process, upgrade their speed, radius or quantity.
After each cube, the next gets exponentially larger. Unlock prestige upgrades to take with you to the next cube.