Requires DirectX 5.0 or greater. Tested in 32-bit WINE set to Windows 98 with DirectX9 installed via winetricks.
Install instructions: unzip and be happy. Mounting the ISO and installing the game also works fine if you want.
When on fullscreen, a weird flickering bug can occur. Adjusting your resolution on 3DCube.ini or playing on Windowed should solve this.
If using WINE, there are a few important details to have in mind: * Be sure to use a virtual desktop, the game forcefully grabs your mouse input even on Windows until you close it or switch desktops (if using more than one) * DO NOT choose "HELP" in-game, that will open a help screen and forcefully minimize the game, which is impossible to maximize again without force-killing it