Minecraft won't start game.

When I load a single player world, I wait about 30 seconds and then it just goes to Settings, and when I back out of settings it just shows me the starting screen.

Here's what the development console says: http://gyazo.com/5eec185b7e17a8c11bdb24eb504d6698

I couldn't scroll up because after I started the game, the launcher crashed