There once was a pair of virtuous swords that got me interested in this game and then I got to the Dark Soul joke at the beginning, which unexpectedly made me laugh way too hard - so in other words: It didn't take me long to be completely hooked by the game.
I can't praise this game too much. It's just Once in a Lifetime, but better. The only inferiorities it has compared to OiaL are, that it is shorter (at the moment) and it hasn't an incredibly satisfying ending (yet).
Also, Eternum contains the cardinal sin: I have a clear favorite girl. Every single time Nova is on screen you just know you are in for a good laugh, utter chaotic randomness, and a high probability of head pats - and don't get me started about the scene in the tomb. The 5th scene from Eternum already dwarfs some of the OiaL's scenes on the last page.
But every single other girl collectively occupies a close second place. I also love how unique and well-balanced the girls are. There are no clear "levels of importance" between the girls like in OiaL. I especially like *Lara Dorren*, who is among other things, a walking Witcher reference. I only hope she will ascend to the level of a main girl soon and will not be relegated to the sidelines.
Also, the music is great and very fitting. Eternum is simply music-wise the best VN I have ever played. And yes, I am listing to "Run Boy Run" in a loop while writing this.
Furthermore, it seems like you have a background in chemistry as well, which I really like. Some very convincing comments in OiaL and the perfect parody of classical analytic chemistry in Warthogs made me think that. (You even got the dude right, who gives wrong information on behave of the professor.)
In the end, I can't really do much more, than patiently wait for update 0.4. I've already seen Alex in a maid dress / her work uniform in a Patreon preview, so I know for sure, that this update will be awesome - also because the heist cliffhanger will be resolved in this update. You just have to respect a man, who creates a masterpiece and then immediately manages to top it.
In other words: You got this - I'm sure it will be perfect.