The game "Choy-Lee-Fut Kung-Fu Warrior" (ZX Spectrum) makes it into the game, but then it's instant game over, as if the time ran off in a fraction of second.
Also ZX Spectrum, "Hostages": the Kempston joystick doesn't work in the main menu.
I imagine the ZX Spectrum responsibles already know, but being less obvious bugs than instant crashes I thought it wouldn't hurt to notify them here.
EDIT: Both games work fine with keyboard.