Focus fixes and sound

shaders/warp_shader.gdshader

@@ -4,7 +4,7 @@
 shader_type canvas_item;
 render_mode unshaded, skip_vertex_transform;
 
-const float curvature = 3.2;
+const float curvature = 2.9;
 const float vignette_multiplier = 0.6;
 
 uniform sampler2D screen_texture: hint_screen_texture;