I've read some stuff about the great time-killing Tetris, and as I already knew, the game trains your brain, but I don't get what it does. I'm not a neurologist, or any kind of professional at all for that matter, but I wonder, does Tetris do anything to your brain that can benefit in other ways than killing time? I read that it improves "cerebral energy consumption" but that's a sentence I don't understand.