どういたしまして。

ああ、そうですね！ I actually didn't know about its usage as a replacement for という! それはきっと役に立つでしょう！ 助けてありがとうございました！:)

You need to interpret the two lines as a whole. The first line says "What do you want to escape from?", while second line says "From the so-called reality?" ／ "って" could mean "は" depending on the context as you said. ／i.e. 君って本当にいい人だ。（君は本当にいい人だ）／ In this song, however, it is almost the same as "という”, which usually means "so-called..." or "what is called...". Precisely speaking, "という" has been changed over the years to "って" so that you can pronouce it more easily. ／ If you were to say what the two lines mean in a single sentence, it would be " (君は) 現実ってやつから逃れたいのか？".