Put the summary of the bug you're having here
What I expected to happen was...:
The single player level to load.
What actually happened was...:
The screen froze on the loading screen.
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. Start up game
3. Create New World
4. Crash.
Please attach the complete output of the "Development console" which can be found on the second tab of the launcher.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".