Mercury Meltdown Revolution is indeed a game best enjoyed in private - spectators will likely wince at the eclectic music which is at times strange and repetitive, with an often jarring quality. An option to run soothing MP3s off an SD card, like Excite Truck, would have been a most welcome addition. Once your properly absorbed by the game though, chances are you won't even register the music. It's easy to obsess over finishing a level, and realise hours have flown by as you try and save that last drop of mercury.