Thank you so much for taking the time to make a Let's Play of my game! It completely made my day, and I'm glad you enjoyed it so much.
To answer your questions at the end of the video, you found pretty much everything significant, including in the Gallery and with the endings. You're free to go back and play around with the world, of course, but you won't find anything noteworthy.
If you like this style of game, I highly recommend you check out the rest of this year's Dream Diary Jam entires- they're all incredibly good. And if you aren't familiar Yume Nikki, the original game we're all making fan games of, I recommend that, too. It's much larger and leans harder on the horror spectrum, with many more effects, worlds to explore, and quirky events to unlock. Best of all, it's free on Steam.
Seriously, thanks again for playing my game. The feedback is always nice, and tells me what I have to work on next time. (And don't worry about getting copyright struck; all of the songs used are in the Creative Commons!)