Thanks, I'm glad you liked it.
I planned to add a gallery, but there were too many things to work on toward the end, so I didn't get around to implement it. You can view some of the older scenes in the endless mode, but I understand that it's not as coinvent as a proper gallery.
As for auto-collecting hearts, I considered it but there was a game design challenge. I didn't want people to idle through the game and miss on all the click dialogues, so I would've had to restrict the heart collection automation in some way. But then, it wouldn't be a proper automation and that wouldn't feel fun to play, so I just gave up on that direction.