64.0 minimum requirements for Windows assume having at least Microsoft Windows XP / Vista / W7 / W8 / W10 operating system. Your processor should be 1.2Ghz or a more powerful one. The minimum RAM requirement is 1000 MB. As for a graphics card, it should be DirectX 8-compatible graphics card with at least 32MB of video memory. You also have to have 150 MB free disk space to install the game.
If you go for recommended requirements for 64.0 for Windows, your operating system should be Microsoft Windows XP / Vista / W7 / W8 / W10. Recommended CPU would be 1.4GHz or faster CPU or equivalent. For RAM, it is recommended to have 1500 MB or more. And video card — DirectX 8-compatible graphics card with at least 32MB of video memory.
As for Mac OS, 64.0 requirements here start with Mac OS X 10.8+ operating system. Processor needs to be at least 2.4 GHz Intel Core 2 Duo. 1000 MB of RAM is required. Finally, the game needs 200 MB of free disk space.
As for recommended OS, it is Mac OS X 10.8+. 2.8 GHz Intel Core 2 Duo processor is recommended. Plus, 2000 MB of RAM.
64.0 is a minimal fast-paced arcade game, where you shoot the squares that have the same color as the background.