the game is not saving
why
Viewing post in Tentacles Thrive (NSFW) comments
If you use Chrome to play web version, there is a possibility it wasn't saved. By clicking a few more times I was able to save it somehow. I suspect Chrome has started to eliminate some shareobjects(save data) that Flash uses.
I strongly suggest downloading and playing the swf or exe versions above. Though be aware that the next public version(v4.00) would not be compatible with older saves.