The worst part is that their website had the game listed as mostly done, then they had the hiatus, then they started a new project and set this one to be released this year. Like, did they get bored?
Game was never even close to be mostly done, but the next smaller update was mostly done for the whole last year before announcing in December the complete version being released this year instead of the smaller update. And yes, Icstor got bored with this game already before releasing 0.5 update in late 2018. Already back then he started to plan his new project, so his original plan with this game was to do maximum of two more updates and then be able to move on to the new one in mid 2019, just like he had done with his earlier games. But the supporters didn't allow him to do it this time because the game was something else back then, so then in return he made excuses like getting mentally ill, which was his reason to take one full calendar year 2019 to make 0.6 update, and then after that he once again last year tried to pull the "one more update then to the new project" stunt, but was once again shot down with that idea by his supporters. Instead he was given this idea to work on this game and his new project simultaneously, which of course allowed him to work on this game with decreased effort and time. Ever since then it's been in this stalemate situation with him, and since his supporters really only cares about this game and not his new project, the demands and unhappiness towards him has been increasing all the time.
Developing this game hasn't been fun for him anymore in over two years now, so the only thing compelling him to finish it (if that truly would be the case) is the thousands of backers demanding it. It's the childhood equivalent of your parents forcing you to eat the stinky liver/vegetables on your plate.