As a miner, your goal in life is to collect enough diamonds to unlock the exit to the next level, all the while happily digging through levels with some impassable walls and... boulders of course! Lots of them.
Boulders obey the laws of gravity, and as such will happily fall onto your head lest you be vigilant not to trigger their fall, or fast enough to dodge them.
Later on, monsters also roam the underground corridors and give you a chance to further refine your skills at last-second boulder dodging - you let the monsters get the hit on the head!

This particular installment of the game boasts 24x4 levels of digging fun.

Here's a long lost Boulder Dash hack with all new graphics and level layouts, Schwa put a lot of love into this hack for all people to enjoy. Collect all the gems in all new scenarios, collect the gems from beginning to end, collect 'em!

Database match: Boulder Dash (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: 45220F3A088E154A9531E8E2B17583AD5E9B35D6
File CRC32: 8F1536
ROM SHA-1: A856DB911542DC835DB7CE67DAD3E159BD7A637F
ROM CRC32: A8F4D99E