- Fixed unresponsive even listeners (keyboard input and window input).

The single player menu class called "startLevel" on the event thread and never returned, which means the event thread was drawing the game to the screen and was not processing any events.
- Fixed unresponsive even listeners (keyboard input and window input).

The single player menu class called "startLevel" on the event thread and never returned, which means the event thread was drawing the game to the screen and was not processing any events.