==UNLOCKABLES==

-Endings-
The game has 4 endings depending on your performance:
+------------+----------------------------------------------------+
| Unlockable | How to Unlock                                      |
+------------+----------------------------------------------------+
| Ending 1   | Defeat all the bosses                              |
| Ending 2   | Let 2 bosses escape and defeat the others          |
| Ending 3   | Let 3 bosses escape and defeat the others          |
| Ending 4   | Let all the bosses escape, including the last boss |
+------------+----------------------------------------------------+