A really nice puzzle game! I like your fade effects at the title screen and at game over--very smooth. I didn't realize at first that you could cycle all the way through the combinations (not just flip the columns), but I figured it out. It might also be nice if you had some kind of a fade-out or in-between effect for when the jewels clear (it's a bit abrupt right now how quickly the other jewels fall to take their place). Great use of the whole screen and good design!
Glad you liked it. And, really, thanks for the comment! The feedback is quite helpful as to find out what little details people found good/bad. I'm going to release a more polished version where I factor in these suggestions (when I get the time).