implemented game loop!

src/main.rs

@@ -3,7 +3,7 @@ use bevy::prelude::*;
 mod components;
 mod systems;
 
-use systems::{gameplay::*, movement::*, setup::*};
+use systems::{customer::*, gameplay::*, movement::*, setup::*};
 
 fn main() {
     App::new()
@@ -17,7 +17,10 @@ fn main() {
                 fryer_cook,
                 customer_serve,
                 update_progress_bar,
-                update_burger_indicators,
+                update_player_indicator,
+                spawn_customers,
+                despawn_customers,
+                update_customer_indicators,
             ),
         )
         .run();