I should say that the art is quite easy on eyes even though the drawing may be a bit odd for some, and that the futuristic atmosphere there is quite neat. That said though, perhaps the author realize that this kind of VN is like soft drink (ie lamune), quite nice and yet it didn't bring something more than that. It also interesting to note that the bad vote on Erogamescape there may be because the author wrote the crude joke to female (I forgot the exact case), which obviously can be said as the sexual harassments. Lastly, while I understand that there's a license issue with the engine, unfortunately the engine for the English version is not the best to say it lightly with the most glaring flaw is that there's no voice playback in the backlog, in which it's something that even older VN provide.
To conclude this, while Lamunation here is obviously not the VN that would be something like WA2 or Muramasa, at least it's quite a nice VN on it's own, especially for it's fans.
PS - For the info, in regard of the opening I prefer the 2nd one.