There are also some changes on the gameplay: allowing player to use mouse to point the shooting direction instead of manually using buttons so rotate the direction. It took a while for me to figure out how to convert from screen space to world space. I finally use FBO for this problem. See my previous post for more details.
I also tweaked the camera so it has a floaty feeling making it less rigid. Thanks to Rob for the old tutorials ;)
An update from version 0.01:
Updated: new video while testing the game: