I Am surprised there was no official version of this for the CPC. Nice one!
This also reminds me that there's a huge space left for games that never were poirted to the Amiga. I wish more people would get into that. It's not a waste of time at all, and it hones your mad coding skills when trying to port a game, specially if you have to deal with limitations and cut downs from the original platform it was created for.