I really liked this visual novel, there's a lot of creativity in there, specifically in the world building area (that nobody seems to mention). I like the setting so much, I'm craving a sequel to it! The technological gap between the two species sure was a cool idea, and I'd like to learn more about why the "goat people" would go as far as to build ark ships... fleeing their home world for a reason? I feel like there could be so much you could still do with this universe and the two main characters! Though I have to admit I was hoping for two routes being available here, but that's just me and my... specific interests talking. ;p
Now the (really) small piece of technical criticism: I'm a retro fanatic, so I usually inspect games and programs for their backward compatibility. I also fancy binary-hacking programs to make them work where they're no supposed to.
On the Steam page of the game you claim the VN would run on a potato and specify Windows XP SP1 as the oldest Microsoft OS capable of driving it. Typical for a Ren'Py game, they can usually all work on that platform. This is untrue for this one though; The game load-time links some NT 6.0+ libraries including bcrypt.dll, which is only available on Windows Vista and newer. I suggest either re-compiling the game targeting an NT 5.2 platform for 64-bit (XP x64, Server 2003 x64) and NT 5.1 for 32-bit (regular XP), or - and this would be much easier - specify Windows Vista as the minimum supported operating system on the Steam page. That'd just be editing one line of text. :)
Anyway, I'll leave a few coins around for this visual novel, it's definitely worth it! :)