Certainly very good video.
You are playing with games which are rather Amstrad CPC instead of Spectrum versions (monochrome). I noticed on Nebulus, that it is slower than the spectrum version. Or maybe may felling cheating me?

Thanks.
I chose games with more colorful graphics.
And among my already posted videos, I didn’t have many footage of Spectrum games to use.

Nebulus didn't seem slow to me. It seems the speed is the same as on the ZX Spectrum. I know that the Commodore 64 version is faster.