What does this song mean?

What does the song Second Go by Lights mean? Especially the part where its says "How many coffins before there's a crown" I read some where that the "Conquer a ladder then slip on a snake" means like the childrens game called snakes and ladders, where if you land on a ladder, you advance farther, faster, and if you land on a snake, you go back instead. So she feels like she has to keep restarting? I don't know.. I'm confused.