The pattern I have found to be the most reliable is the following:
- "Shrink" powerup accessible heart in the castle.
- Second heart powerup in the castle.
- Heart stuck behind forcefield in the room right of the large, dark room.
- Heart in the tall room after the large, dark room.
Thank you for the reply. The fifty times thing is no joke; I play it sometimes when my professor drones on and I need something to focus on for ten minutes. Let me know if you ever need a dev tester for any future versions as you can already see I'm very thorough lol.