Yeah I'm aware of the audio problems, it's very similar to the screen shake problem, a simple workaround is to limit the maximum number of sound playing simultaneously, especially the hurt sound, but that's a bit more complicated than the screen shake problem since I have to preserve a maximum the audio juiciness.
The arrows becoming gravity-less is intentional though, cause for the homing effect to work properly I have to "disable" the gravity, but I can maybe somehow reactivate it or say : "it's normal, it's how magic arrows work".