Actually modern mobile phones (mostly those that come out of the shop with at least Android 7, but some earlier models are included) can handle the game just fine, even with the complexity needed to handle those interactions.
Heck, Android 9 comes with a built-in neural network, and that's more complex than a 3D yukkuri game.
The problem is that the game sucks battery power like a vampire so you can do only so much if you don't want to have a dead phone after 30 seconds of gameplay.
You could always play while having your phone connected to a power source, at least if you're at home, but to be honest I would rather play a game like yukkuri diary privately, not exactly the kind of game I can picture being a good "bus trip from home to work or work to home" type of game.
Then now I wonder why Bluesnow didn't implement those other functions then...Unity shenanigans? bloated codding out of unoptimizing coding?
I mean, Blues showed so many features I would like the game to actually have but non are implemented...it can be frustrating more so if we can't blame it on mobile plataform limitations.