Fix some typos

src/events.rs

@@ -1,7 +1,7 @@
 #[derive(Debug)]
 pub enum Event {
     // Fired when the player hits an obstacle like a wall
-    PlayerHistObstacle,
+    PlayerHitObstacle,
 
     // Fired when an entity is moved
     EntityMoved(EntityMoved),

src/main.rs

@@ -58,7 +58,7 @@ impl event::EventHandler for Game {
     }
 
     fn draw(&mut self, context: &mut Context) -> GameResult {
-        // Render gaem entities
+        // Render game entities
         {
             let mut rs = RenderingSystem { context };
             rs.run_now(&self.world);

src/systems/event_system.rs

@@ -31,7 +31,7 @@ impl<'a> System<'a> for EventSystem {
             // println!("New event: {:?}", event);
 
             match event {
-                Event::PlayerHistObstacle => {
+                Event::PlayerHitObstacle => {
                     // play sound here
                     audio_store.play_sound(&"wall".to_string());
                 }