This is a simple set of rules that is only a few pages long and can be learned quickly. Still, it is very dynamic, even a bit chaotic -- which from the author's notes seems to be the intention.
Imagine a skirmish between pirates: you wouldn't expect an organized battle but everyone shooting and fighting any way they can. This is reflected by randomly determined combat phases that give rise to action that is very open to narration and interpretation. Clearly it's not something for competitive play but for friendly games with some beer (or maybe rum!) The book also includes four scenarios with different objectives that might inspire players in creating their own.
The simplicity and the elements of uncertainty make this game suitable for solo play. I've done this and the results were quick, fun battles with very little tweaking of the rules.