Hello,
i love your game. The character development is great and I like the story.
What I would wish for is that there were more items and upgrades (especially for Android, is my favorite character) to buy.
I think your idea with the garden is very cool. Maybe you can also add a fruit tree to take care of, which will then bear fruit that you can harvest.
For more variety, you could also add pictures, other wallpapers or furniture, which you can then buy or unlock.
I just wrote down a few ideas, don't know if that's even feasible, but I hope I could give a few suggestions.
I'm really excited to see how the game develops and I apologize for my bad English. :D
I wish you a nice day.