public void DetectColl()
 {
     // loop through
     // Entities vs. player
     foreach (Entity enemy in current_Enemies)
     {
         if (enemy.hitbox.IntersectsWith(player.hitbox))
         {
             player.Hit();
         }
     }
     // Player Bullets vs. entities
     foreach (Entity bullet in player_fire)
     {
         foreach (Entity enemy in current_Enemies)
         {
             if (bullet.hitbox.IntersectsWith(enemy.hitbox))
             {
                 enemy.Hit();
             }
         }
     }
 }