The simulation closed itself after 12 hours That is not a crash. That is the . The v01 Beta has a hidden hard cap of 43,200 frames (12 hours at 1 frame per second). After that, the simulation decides if the colony "lived" or "died" and terminates gracefully. There is no ending screen.
Post by Sandeklaus in Tentacles Thrive Beta v0.1 (NSFW) comments tentacles thrive v01 beta nonoplayer
The v01 beta was buggy—sometimes a tentacle would clip through a rock—but it was alive in a way no game had ever been. Tentacles Thrive Deep Dive: The World of Tentacles Thrive (v01