Work on more references

src/player.rs

@@ -23,6 +23,9 @@ impl Player {
     pub fn change_life(&mut self, by: i16) {
         self.life = max(0, min(self.max_life, self.life + by));
     }
+    pub fn get_life(&self) -> i16 {
+        self.life
+    }
 }
 
 #[test]