Cute game! the story is funny, the pictures of grandpa (especially the one upside down in the beginning) i also found funny. I always love games with time tracel mechanics, so bonus points for that ! The puzzles were nice and intuitive for the most part, but I couldn't find the last digit and resorted to the walkthrough in your description ( i couldn't find the key in the library). Also the "books" in the library were quite funny hehe.
I couldn't find a way to get to this key?? And I'm not even sure what it would open. Is this a secret that i missed?
I do have to say it was hard to see in front of me when I picked up the paintings. The art style generally was nice, loved the cutscenes. The music was cute and relaxing.
Grandpa deserves jail for abusing his power :)
Keep up the great work!