when you hit play, it starts to load then the mojang screen comes up and then disappears. Then it says not responding and no amount of waiting for the system to respond helps and i close the program.

Put the summary of the bug you're having here

What I expected to happen was...:
the game to load the world

What actually happened was...:
mojang screen appears and then goes away and it says not responding

Steps to Reproduce:
1. click play
2. mojang screen appears
3. goes away and never comes back--- not responding and doesn't respond and must close (i have attempted to wait thirty minutes for it to respond.