There are 2 versions for PC use, one for MS-DOS named Z and another one for Windows 95 named Z 95 & Expansion (that give Zeditor and Extension pack with additional challenging levels from 20 to 31.Search on eBay
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Additional info about Z
Abandonware DOS views: 11814
Say something about Z! Did you play it? Do you feel nostalgic about the good old days? Did you like it or hate it? Do you have trouble running this game? Don't be afraid to ask for help (please, read the guide first). And don't forget to be polite.