The bots are programmed with a simple language that allows you to issue commands based on simple rules such as whether the bot is damaged or not, etc. Every command has a certain time cost or "warm up" time, ie. firing a death ray takes 10 turns, where one turn means one simulation loop iteration.

You can build your own battle bot or you can just play around with the ones that come with the game. Some user submitted bots are also available. You can pit any of the bots against the others and see who comes out on top.

While not new, the battle bot concept is always cool and it's the first time I've seen it done in JavaScript. I only wish it would run a bit faster.