The engine runs at a fairly jerky frame rate on a 3.5 MHz ZX Spectrum, with purely monochrome graphics. However, the game can run more smoothly on 7, 14, and 28MHz ZX Spectrum compatibles.

Voxels are effectively like 3D pixels, and they form an integral part of what is commonly referred to as a ‘retro 3D’ look, with pixelated edges sharp enough to cut your retinas on. The… ...