Good concept, good interface, but far too glitchy.
While yes, this is based off of Motherload which is a great concept that game worked. My greatest problem was that the drill thing could drill when I didn't care for it, then turn around and not drill when I needed it! Other reviewers have not stated this problem so I must assume it was just a onetime incident. However if you put all this work into a game one would expect it to work every time. I'm not sure what is going on with you but if you can, get some beta testers and try to patch things up before you hope for them to be well received.