I just finished the game or what? A door open interface came up, and the game ends there, is this is the end? Im not expecting that kind of end, 3.5 stars for you
If you want to play a completed game by the same author, check out Once In A Lifetime. It takes place in the same universe as Eternum. And it's very good.
As Caribdis said, Eternum is still in development, so the story isn't even close to finished yet.