When leaving the Create New World menu without any worlds created before, the game would just crash.
The error message is as follows:
The game crashed: keypressed event handler
Error: java.lang.NullPointerException: Cannot invoke "java.lang.Runnable.run()" because "this.F" is null
Launch the snapshot
Go to Singleplayer, make sure you don’t have worlds created before
Wait until the menu loads
Click Cancel or press “Esc” on your keyboard.
→ Game crashed.
Linked issues
is duplicated by 20
15 more links
I know how you feel I am having the same problem as well