Trantor The Last Stormtrooper - ZX Spectrum Walkthough

I played this on PC first time around but the Speccy version isn't all that different. Spent hours on it back when I first got a PC. I played the Speccy version through a few times and every time I'd get to the last bit and put my code in and it wouldn't teleport me away. God knows what I was doing wrong but I gave in and this walkthrough is off of the rzx archive.