This is one of the historic ideas for a 2 players game, often known as "Tron".. I remember a ZX Spectrum variant known as "Cruiser on Broadway", IIRC.
It is essential, so even in low resolution it still makes sense and it is small enough to be easily ported to almost all the configurations.
As usual I'm attaching variants for many graphics modes, choose the one fitting at best for you.
I didn't test the Joystick support, any feedback is welcome
Stefano
Snakes
Re: Snakes
Little last minute experiment to add sound, a bit nasty but teasing..