due to the overwhelming request, the 2D spinoff (this game) will be reconstructed after the current project is done, so it's technically on hold, like the other game, Project Unknown.
Jokes aside, yes, he put the first one on Hold and will resume development once he as sufficient budget and maybe a small team to help him to make his dream game, this one was nuked due to a combination of bad luck and dumbness on his part, that he fully acknowledged and has, IMO, already recovered from with the quality of the new game he's about to show publicly, this in less than a year...meaning that in roughly 2 years this guy has pushed 3 playable builds of 3 different projects, the one that is being worked on after an almost total loss of assets...which is impressive by itself...
The reality is that creating a game this complex takes time (a lot of examples out there), expecially if you are solo, he's making progress, as anyone who follows his development has already told in this and the other thread, and you can even see the actual progress for free by joining his Discord: the update and wip channels are open to anyone, so concept arts and screenshots/gameplay videos are free to look at, as is the roadmap.
So yeah...I read the complains and I think that none of those complaining here have actually taken a step outside this site to get a little more informed on the project...