Fix infinite enemy turn with a dirty hack

src/game_state.rs

@@ -250,8 +250,13 @@ impl GameState {
 
     fn move_enemy(&mut self, id: usize, position: Point) {
         let mut target_position = GameState::randomize_target_position(position);
+        let mut hacky_while_counter = 0;
         while !self.validate_target_position(target_position) {
             target_position = GameState::randomize_target_position(position);
+            hacky_while_counter += 1;
+            if hacky_while_counter > 20 {
+                return;
+            }
         }
         self.current_run.level.move_enemy_to(id, position, target_position);
     }