Spawn new entities on each level (will be removed, only for tests)

dungeonbattle/entities/player.py

@@ -24,13 +24,22 @@ class Player(FightingEntity):
         self.map.currentx = x
 
     def level_up(self) -> None:
+        """
+        Add levels to the player as much as it is possible.
+        """
         while self.current_xp > self.max_xp:
             self.level += 1
             self.current_xp -= self.max_xp
             self.max_xp = self.level * 10
             self.health = self.maxhealth
+            # TODO Remove it, that's only fun
+            self.map.spawn_random_entities(randint(self.level, self.level * 5))
 
     def add_xp(self, xp: int) -> None:
+        """
+        Add some experience to the player.
+        If the required amount is reached, level up.
+        """
         self.current_xp += xp
         self.level_up()