Thank you very much for your comment!
I’m really glad you enjoyed the game, and I appreciate that you took the time to play it and even record a video. Very nice !
I’m already looking into the crash you encountered — interestingly, the original Spectrum source even says “We won’t bother error checking as it’s unlikely we’ll reach unit 256.”
On the CPC we clearly can reach it, so I’m working on a fix.
Thanks again for playing — it’s great to see people having fun with it !