Having finally beat the game by getting all the medals, I feel qualified enough to write a review. ;D
This is a good game. It's similar to Miner Dig Deep or Motherlode, but not quite as in-depth as those. I think the biggest improvement that should have been made was the inclusion of a minimap or radar. It can get really confusing down there, what with no landmarks to guide you back to your teleport when you're low on fuel.