Small cleanup, spacing, comments.

src/entity_ball.odin

@@ -31,9 +31,11 @@ update_ball :: proc(ball: ^Entity, level: ^Level, dt: f32) {
    // first check the level timer are we waiting to serve?
    if level.serve_timer > 0 {
         level.serve_timer -= dt
+
         if level.serve_timer <= 0 {
             serve_ball(ball) 
         } 
+
         return
    }