No, there are no multiple endings or multiple ways to complete the scenes (nor a specific sequence to accomplish that). About its seemingly vignette-like/fragmented structure, as Calum Fraser in his FGP article said, "In In Memory of the Eternity you’re not bad, although you can do bad things, and you’re not good although can you do some good things – you are just a presence, an entity that makes things happen. During the game you experience life in all different shapes and sizes and impact them in unique ways – some mundane, some sad and some funny. In Memory of the Eternity is all about embracing the many aspects of life – horror, happiness and everything in-between. After-all, all life is a miracle and we should be thankful for every sad, mad, happy, surreal, grotesque and beautiful second of it." (https://www.freegameplanet.com/in-memory-of-the-eternity-full-game-download/)
Whether we should really be "thankful" for all of them or not, I'll leave that to the player's interpretation. But one thing is for sure: no matter their impact or entity, our memories will be the only way to live on after we'll become one of them. Important ones, unimportant ones... made up ones, real ones... they're all part of the same narrative that our existence is projecting out into the eternity. It's what makes our "here and now" interesting and worth living.