Maaan, I hadn't even realised it was 6GB in size. And made on RPGMaker?... Really?... Odd choice...
I might come across as mean, but... it seems to me like the dev might be a bit of a newbie tackling a project with a name that carries a lot of weight and expectations to go along. Seems a bit ill-advised, imo. Setting himself up for heartbreak. Though I might be wrong about my impression.
Haven't played the game itself, so take my words with a pinch of salt. I'm just speaking from a very surface level.
Though, to be honest, I do reckon modernising Simgirls is possible. But it's just that only remastering its graphics is not gonna cut it.
To truly remake Simgirls into this modern age, I think you gotta sit down and think hard about the game's mechanics, their core essence, their aim, and how to achieve the same goals using more modern design theory and sensibilities.
The original Simgirls is too dated for its mechanics to be translated 1-to-1 into a modern iteration. So I believe it is essential, for a truly modern Simgirls to succeed, that the mechanics be fundamentally rebuilt from the ground up. To give it the Final Fantasy VII Remake treatment.
On a brighter note, however, I do have to praise the teaser.
It was fairly well done, to be honest. And it managed to get me really excited about a game I hadn't properly seen, and before I started reading about all of the issues. The dev has good sense, at least in that regard.