Unregistered non-gamer

Oh, I didn't realise you had a link to it on your website, thank you. My son had been previously playing the limited edition which seemed to be the only one available elsewhere. Now to get it working without the MIDI playing up... Works with the music off, but when you go to the first game level it goes to the black screen & gets out of the game. I've tried all the different MIDI options and it does the same thing. I also notice that when you turn music off, it simply stops MIDI instructions, so any notes that have not stopped continue to play. Is this a bug with the game or is there some setting up I can do?