I do enjoy a good “dirt and boulders” game. And Simon Hunt’s Diamonds, published by English Software in 1983, is certainly a good “dirt and boulders” game.
Casting players in the role of Digger Dan, part-time member of Blue Man group and long-time precious stones enthusiast, it’s up to you to gather the titular diamonds while avoiding the unwanted attentions of Brian the Blob, Philip the Filler, The Fireflies, The Eyes, Simon the Snake and The Demon. Brian also wants diamonds; the others just want you dead. Which isn’t very nice.
This is a longstanding personal favourite of mine from the Atari 8-bit era, and a game I still like returning to today quite often! Check it out when you get the opportunity.