Driven witless by the UK heatwave, I throw open my email inbox and search desperately for videogames about waterfalls, canopies of thick palm leaves, and the sibilant settling of ice in the bellies of the largest, most enduring glaciers. Instead, I am challenged to excavate a world of sand. Hooded Horse and Lantto Games have announced an early access release date for Sandustry, their 2D factory-building game in which resources break down into pixels with individual physics. It’s out in…