You start by selecting which components your bot will use, including CPUs, engines, armour, weapons, scanners, and so on. You then code it all up using the built-in language, assemble it, and you're ready to go. The simple quick-start tutorial is a great starting point, showing you how to create a simple bot that goes in circles and shoots whenever something is in front of it.

The graphics are very basic, but certainly sufficient, so I'd recommend it as a fun way to help people learn more about assembler programming.

(I'm running it on Linux, but apparently it works on Windows too.)