Bro you payed only 2$, chill out. The reason game is not finished is because LAGS added ton of extra content lately. In the last year alone there has been like 15 new animations and a whole new game mode with Annie. It's clearly a passion project and it shows.
It is crazy that this game still gets so many updates years after initial release and you somehow make that sound like a downside. Yes you are correct, the game could've been finished 2 years ago, he could've just added 1 CG saying "You completed the game!" and that's it, no more updates, no rework, no new Annie mode. Maybe he should've added everything later as 10$ DLC like others do. Would u be happier?
It's even crazy to demand the dev to "communicate" more when he already replies to comments almost every day (no other game dev does it). He already said 50 TIMES that he's pausing HTA for some time while he works on the other game, what more do you want him to communicate.