Nice work!! Shooting, walking, changing scenes works fine! Some suggestions from my side, if you'd like to improve it: Try using a kind of sound manager for the music. This way, when changing scenes, music won't start from the beginning, which might be annoying. For shooting consider to try a mechanic that the bullet you shoot flies in the direction of the mouse at the time you hit LMB (You can save the global_position of the mouse and use it as a target"). Other than that: Be proud on what you created!