As was said before, short and sweet. The writing was far from perfect, but it does the job. Also, more games should start with a character's hat falling off and catching fire. Great way to begin any story, really.
I love the art style in particular. The characters vaguely remind me of Seinen manga, and the backgrounds have a lovable sketchy charm to them.
The choices clearly don't matter, which I think is fine by itself-- my main complaint is that there could've been a bit more flair for the "wrong" choices. Even a little pun, or a line of dialogue being changed in the final scene would be enough. The short little dialogue with Reisen works though, and I think more of that kind of dry humor would help.
In short, 'twas nice.