Thumbs up [APP][2.3.3+][v1.0.0] Shoot em up

This is my second take at libgdx. Enjoy this shoot'em up where your plane can turn from black to white as in Ikaruga.

Link to Play Store: play.google.com/store/apps/details?id=com.jp.blackwhite.shooter

I would appreciate suggestions and anything to improve it. Have fun!