This is very cute and cozy! Nice and polished game, well done =)
What was a bit unfortunate for me is that as soon as I was able to advance 1 hour, I got so much money at once, that after that I could just stay in the shop and clicking the buttons without being able to see grannies :( Maybe if you can incorporate the shop interface into the main game screen it would allow you to buy upgrades while watching over grannies at the same time!
Also I was going to try a 100% completion and advancing one year took quite a long time, so I was wondering how much time it will take to do this 100 times... xD But then when I tried to advance 1 year for the 3rd time I guess something glitched? Cause it just kept calculating and calculating for much longer than first 2 times took...
But apart from that, I enjoyed playing, super relaxing music also!