Kye is an action-puzzle game. Kye (the green sprite) must collect the blue diamonds without getting stuck or eaten by monsters. There are many different items in the game; Kye can push some and, under certain circumstances, pull them. You should experiment to find the properties of the various objects. There are hundreds of different starting layouts (called "Levels") and it is easy to design more of your own.
Although it may sound simple, Kye offers many unique challenges that can occupy you for hours. Some levels offer arcade action, some are simple games for very young childen, some require chess problem type analysis, and others give dynamic displays. Kye is surely one of the best computer puzzle games ever.
Both Windows and Linux versions are shareware or free, and can be downloaded from or via links from this website. There are also many levels to play that can be downloaded from here, and links to even more. Level editors are also available here and any new levels you design can be added to this site.
Kye was originally written in 1992 by Colin Garbutt as a charity shareware program for Windows v3.0; on this website I refer to this version as "Classic Kye". Since then several other versions of Kye have been written, some of which seem to have since disappeared. There are however links to the web sites of all known active ones here.
The original Classic Kye supported the Save the Children charity, and when you registered with the author and donated to that charity you would receive a further set of levels known at the time as "The Registration Levels". Since it is no longer possible to register, I now refer to them as the "Charity Levels" and they can be downloaded from that page. To maintain the original spirit you are requested to donate to a children's charity of your choice.
There are demonstrations of game play on YouTube here (open in new tabs) :
Kye - Introduction by cph6uk.
Kye - The Diamond Collecting Puzzle Game for Mac & Windows by YesterYear's MacGames