The Nayru's Love leaving and returning thingies keep going forever. If you wait around long enough (a couple minutes with the frame limit off), they'll fly past the screen again eventually. If you keep casting more and more of them, the game starts to behave a little weirdly... Most items don't work; sometimes instead of your sword or the wand you'll fire one off those Nayru's thingies instead. It's funny to see the little blue balls I have set up shooting out like sword beams, lol. I don't know if any other items are similarly glitched.
(Let me know if you need some help to verify.)