Thanks. I haven't actually rated any games yet, so I hadn't seen it yet.
It's basically a tamagotchi or idle game. Water keeps the plant alive, while food allows it to grow (as long as it's watered).
I'll probably do a blog post at some point. Basically, branches can sprout from the end or or middle of a stem; there's a random range of angles in either case. Each branch is parented on the point it sprouted from, so its branch angles are reoriented to that value.