I kinda think it's unfair to assume it's abandoned when Kenko has been updating his patreon the past year. And we already waited a year for the first demo, as Kenko announced his plan to create a game on October 2019, and the first demo released early November 2020 and the english translation for it released late February 2021. And keep in mind that Kenko is paying for the english translation out of his own pocket in order to appease western fans, he didn't have to do it, but he did it anyways.
It took around a year for Kenko to make the demo; and in the demo there are only two monster girls available to the player, so I understand how some people are suspicious if Kenko is actually going to release it soon. "If it took a year for Kenko to make two monster girls how am I supposed to believe he'll be able to make at least 4 monster girls in the same time?" is something you might be thinking; I can't say anything to prove that he is able to achieve that, but I do trust in his abilities.
I'm going to predict that chapter 1 will come out no later than April, and will have 4 or more monster girls in it. If it doesn't fulfill both of those requirements then I will eat my words and change my profile picture to whatever picture you guys want and write a shitty fanfiction of whatever two characters are DM'd to me at the start of May