It's a great game, but I gave up after a bug in crystal crafting came up in a few different ways. At first it seemed to happen only if holding a finished crystal while clicking on the craft button, but other freezes where the boxes for crystal crafting disappear made the same thing happen: when you set down a finished crystal, random crystals, even on other characters, change to the same kind as the one placed. I don't know how to get that to stop other than to clear flash data and lose the game progress.