If you had any sort of brain, and had ever watched Dani's videos, you would know that he is finishing the game, and you can wishlist it on steam. He released an update video more recently:
He is adding more levels, multiplayer, and changing the grappling.The game came out 2 months ago, and this is a lot for one person to develop on top of making other games and youtube videos. The reason that the updates aren't on itch is because the game will not release for free when it is finished