$5F46: end of demo cycle
$086F: 30 -> 54 to disable sound (context is A9C08DFF47ADFD47C954F005A930)
$1105: 8D10C0 -> 4C0001 to exit on keypress (context is 8DF2104C3C148D10C0)
$151A: 8D10C0 -> 4C0001 to exit on keypress (context is AD00C010E68D10C04C0010)
$5EA5: 8D10C0 -> 4C0001 to exit on keypress (context is AD00C010068D10C04C465F)
$5F3B: 8D10C0 -> 4C0001 to exit on keypress (context is AD00C010068D10C04C465F)
no joystick support on title screen or demo