If you like fighting games then take a look at this one. There are only a few fighting games for the Electron and this ranks pretty high. There are many opponents to defeat and each one has more skill than the last.
The only weapons at your disposal are your hands and feet. These can be used to good effect and, as long as you do not keep repeating moves, many opponents will fall to your skills. The graphics are nicely defined and well animated and the controls are relatively easy once mastered. There's a two player mode as well as a practice mode.
The game can be used with the First Byte joystick interface and the Plus 1 interface. Users of Voltmace joysticks however will probably have to stick to the keys!