This is a pretty fun game to sit down and play for a half-hour or so! That said, I was growing my ridiculous-looking tree (I grew a zillion branches off of the same area) and I grew a new root, and it crashed. Here's the error message:
roots/buttons.lua:157: attempt to index a nil value
roots/buttons.lua:157: in function <roots/buttons.lua:146>
nx/game/actor.lua:256: in function 'callForAllComponents'
nx/game/actor.lua:211: in function 'onMousePress'
nx/game/scene.lua:336: in function 'onMousePress'
nx/scene-layers.lua:28: in function 'onMousePress'
nx/input.lua:8: in function <nx/input.lua:6>
[C]: in function 'xpcall'
Not sure why that happened but it was going well before that.