Aww, thank you for the fanart! I love the character poses!
For your questions, 1: I pictured Stefan and Alex being of Polish/Eastern European descent
2: We are mostly working on getting the assets required, my plan is not to release another update that ends on a cliffhanger but that shows one of the possible endings, even if the choices required to get there need to be hard coded for now. My next pass (after the next update) will be to introduce the necessary choices to get the remaining endings!