The game is an implementation of Jewels, the puzzle game. You will swap two jewels in order to get horizontal or vertical rows of three or more, which then will disappear. A jewel may be part of both a horizontal and vertical row at the same time.
You move with the keys U-N-H-J, select jewels with space and Return to restart the game. There is a small bonus for creating cascades, i.e. one removal and scroll down causes another removal etc. You have roughly two minutes to go. Whenever the time is up or there are no more valid moves, the game ends.
http://www.cbm.sfks.se/files/jewels.zip
I'm not sure it is 100% bug free. Sometimes I get the impression that the game accepts a bad move and jewels disappear without being three in a row, but maybe it is me not paying full attention to the board. I can not on purpose reproduce any buggy behavior. The two earlier revisions had more serious bugs which I fixed.
At first, I was planning to use custom graphics and maybe have a splash screen, but there was no room for this. Maybe if I would make it a 4K game, which would leave lots of space for graphics, high score lists, music and fancy stuff that is not really required for the game. Source code may be available upon request after the compo.
