The hero of this game, Rockford, is a very cute fellow. He specialises in
digging tunnels and collecting jewels. The snag is that the ground through
which he burrows is littered with boulders, which drop into the tunnels and
squash him if he's not careful.
There are 16 sizeable caves for Rockford to dig his way through, you can
choose to start at the first, fifth, ninth or thirteenth, so even if you're
hopeless at the game, you can get to see quite a few different screens. Each
cave has different problems; some are relatively straightforward, while in
others the jewels are guarded, or have to be created by strategically
dropping boulders onto assorted obstacles.
The graphics are adequate rather than stunning. The weakest point is that the
screen scrolls rather slowly. If you move too fast, it is possible to lose
sight of Rockford off the edge of the screen, where he can run into unseen
hazards.
It's a game with lasting appeal, needing careful planning as well as fast
reactions, and is well worth adding to your calculations.