What is Boulder Dash: rules, traps and a few tips
The igrasu.ru catalog has hundreds of games, and this is one people return to after decades. Here is how it works and how to get the most out of it.

What kind of game is it
Boulder Dash is a cave-digging puzzle. You control a miner who tunnels through dirt, collects diamonds and reaches the exit. The main threat is boulders: they fall straight down, and getting crushed ends the run. The board of dirt, rocks and gems is laid out so that every move matters.
Controls
Controls: arrow keys or WASD to move and dig. You can dig in any of the four directions when the tile is passable. Sound and pause are on the game page. The level best score is stored in your browser.
A few tips to finish
Never stand under a hanging boulder — wait until it drops and settles. A diamond squeezed against a boulder spawns an enemy, so keep your distance. Scan the level top to bottom, plan a route to the exit, then act. And watch the timer: when it runs low, the cave starts collapsing on its own.