Dust Digger

Dust Digger is a Boulder Dash clone with the usual features. You dig tunnels in the dirt, picking up diamonds while avoiding the green spiders. Spiders can be killed by dropping rocks (or diamonds) on them, but so can you. On each level, you must collect a set number of diamonds, and the key to the port, before you can pass through the exit to the next level. If you get trapped behind some rocks, you have a self-destruct button to restart the level.