As it's been almost 3 years since the public release with no other updates, I'm assuming this is an abandoned project?
Viewing post in Tentacles Thrive Beta v0.1 (NSFW) comments
they had an update post on the patreon from 3 days ago, unity build is progressing at a good clip now by the grace of a skilled unity dev they got a few months ago. it's not playable yet (and hoo boy is there a backlog of scenes to implement still), but a beta test is being aimed for some time in august.