Earlier than any one could be waiting for, there goes the link to version 0.3.1
https://palmeirastudios.itch.io/lost-lagoon/download/eyJleHBpcmVzIjoxNzQwNzY1NTUwLCJpZCI6MjMzOTQ2MH0%3d.8Mof%2fmGQ2zyY1ml5HOCsAaHqfHs%3d
And here goes some more options:
https://f95zone.to/threads/lost-lagoon-v0-3-1-palmeira-studios.179909/
https://lewdzone.com/game/lost-lagoon/
https://www.reddit.com/r/lewdgames/comments/1j07mmz/the_slimegirls_are_back_lost_lagoon_v031/?tl=pt-br
https://gamcore.com/games/lost_lagoon