Just finished watching it now.
What is quite funny is that the Coleco, SG1000 and MSX versions are all so different.
The SG1000 and Coleco are near identical hardware wise, over the last few years people have been porting all the SG1000 games over to the Coleco because its so easy to do. The MSX also has many similarities with them too and quite a few MSX games have also been ported to the Coleco.
It seems really strange that Sega took that approach to the game on their own system as the Coleco proved it was possible on that hardware!