Came across a game on Steam that features tons of furry / kemono / goo transformations. The game is called "Changed." It has a mix of pixel art, cg and partially animated tf's as well as a story. It is a challenging game that boasts about 3 hours of content, and my estimate of around 30 or so original TF's. The game is currently only out in Chinese, and should have an English language patch out in a week or two. The price is $ 5.99 USD, features some mild suggestive content, but is not a hentai game.
Link:
https://store.steampowered.com/app/814540/Changed/
P.S. There is also a walk through if you look through the general discussion for the game.