Gemstars is a small twist on the standard "Match 3" puzzlers. You rotate a disc of coloured gems and drop matching gems in to break groups. When you do, they fall and create a Gemstar. Clearing cascades earns greater rewards, and achievements!
I've always wanted to knock up a "colour" based puzzler, and the spinning puzzle mechanic proved to be a good idea IMHO - it lends a novel twist to an overused (but still fun) genre of puzzle game.
Despite it all being "Programmer Art" I don't think it looks too shabby, and I'm happy with the Achievements system which helps the sense of "progression" along nicely.
I'm getting some "real" art together, and reinstating the "meta-game" around it proper, with luck - it might reach a game portal yet ;)
All honest and constructive feedback welcome - it didn't really strike a chord with anyone on IOTD :)
OpenGL v1.1 or above, DirectX 8, and a sound card :)
(OpenAL is required, and is installed as part of the Gemstars installation process)