Sigh... Finally beat boss... And I'm done with this game. Period.
But as a parting note, the strategy guide to beating the boss.
1. Destroy the castle (Obviously)
2. Spam 1 and 4, and when you have enough mana, make an angel.
3. When 'The End' gets in range, auto-fire all arrows
4. Keep spamming 1 and 4
5. Watch your eyes rot
6. Win and get 30 points