Revert "MainGameCamera completed!!! use WASD and mouse to control camera"

This reverts commit a0bb437844951761f831697a9cb332eb569161b8.
Revert "Revert "MainGameCamera completed!!! use WASD and mouse to control camera""

This reverts commit ba7a76c9c1fe584f90aa59e3f75189c698cb1b4e.