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!

Nice one! Sad it has no sound.
Totally forgot to rotate the blocks at the beginning but the white one help me to survive the first round.