Perfect, thank you very much, and when you get time, I appreciate you've probably got plenty on. And incidentally the 'toast rack' spectrum and grey +2 are very closely related hardware wise, so if you fix the +2 it will almost certainly work on a 'toast rack' machine as well :) The emulator I use called Speccy works fine with your game when the hardware emulation is set to ZX Spectrum +2A so at least you know where to start :) You'll find the excellent Speccy emulator here in case it helps trouble shooting - https://fms.komkon.org/