Directions work well.
Fire buttons A becomes Fire1 Fire2 on Amstrad, and Select button becomes Fire 1 on Amstrad. Not always practical, yet usable.
Also the 16bit SEGA paddle is a lot better than the poor Amstrad Pad, so a nice choice for every gamers, often quite easy to find.
You may also get the Amstrad Megadrive paddle thx to the Amstrad PC with the megadrive inside, a must have to all of us...