The game IS being developed, Foxyghost (author) is just a bit quiet about it, too quiet from a dev-forefront perspective if you ask me.
The updates are in Patreon although few and far between. Lots of progress has been made by the looks of it. It seems to be all about finishing the actual structure of the game, the artwork looks very good and promising.
Making a game like this can be a very lengthy and straining process on top of whatever happens in regular life, so please just be patient, I do agree that not having dev updates for months or even over a year isn't a good way to go about it but I think all the "game dead", "where's the fucking update", "give us more content" comments don't help with motivation.