Dont listen to them, they are still active on development of the game.
Just go check their Twitter ( X ) account, you will see that they have had some progress made in July.
Also it is on Steam... Its been on Steam 2 years ago.
Not sure why its no longer available on Itch, but it could be because of what Payment processors did to itch long ago.
But it is on Steam and it only cost 9.75 Euro