Samurai duelling are two of the most epic words in existence, so it makes sense that putting them both together makes a great deal of sense. Players face off against each other in gorgeous backdrops that resemble feudal Japanese woodblock scrolls, tactically trying to out-think, out-stance and eventually psyche out their opponent. It's a gorgeous-looking game, and you can get a DRM-free download for less than 20p minimum.
As always, though, pay what you think it's worth and what you can. If Kiai Resonance gets Greenlit, you'll also get a Steam Code down the line as far as I know.