This one's pretty neat. The controls took some getting used to — they're confusing at first, but you do eventually find a rhythm. That said, an option to steer with the mouse (instead of WASD or the dial) would feel much more intuitive.
One issue I hit: I accidentally ran out of energy and then couldn't do anything at all. Some kind of recovery or reset option would help.
Overall though, it's a cool experience. I've always enjoyed excavation-style games, and this scratches that itch.