Reminds me of other older "mining" styled games, like XGen's Motherload, which is made before a time Minecraft existed.
On this game itself though, the gameplay seems to be one of the most developed - just good enough to come out as an "underdog" of the torrent of stuff that comes in the portal. What the game really needs though, is background music. Eerie silence just makes the game a liiittle too hard to get into, given its graphics.