This is a terribly concieved quiz. "Alter ego" is not the person's actual name. "Himself" is a terrible answer for "who does Captain America fight." Tony Stark doesn't kill Thanos twice.
I’m sorry, but there are more things wrong with this quiz than are right with it. It’s a good idea and many of your questions are really good ones, but there is so much sloppiness in your execution. You need to make sure your terminology is correct and consistent (e.g. “alter ego” is meaningless, Black Widow’s not actually the one who receives the Soul Stone), fix a lot of typos, use quiz features correctly (e.g. in the first question, Ironman and Nebula need to be two separate Answers while sharing the same Hint), and finally, enormously expand accepted answers and spellings (e.g. when looking for “Captain America”, you’ll need to also accept, depending on how charitable you’re feeling, Capt America, Steve Rogers, Steve Rodgers, Steve, Rogers, Rodgers, and maybe Roger and Rodger – ditch the entire “alter ego” thing unless you come up with a much better way to ask it).