A tree is nothing new, like a wheel. It is more about how to make it quickly and intuitively accessible. I think your solution needs some fine-tuning since you always have to remember or watch what button to push, at least for some cases. Keep in mind your solution adds a button and complexity to return to the first stage for no reason since it can happen just automatically with other design.
If the selection-hack is serious about it feel free to watch for my solution.
It is possible to navigate quickly and intuitively with just one thumb or digital-pad in a two-stage-tree.
If the selection-hack is serious about it feel free to watch for my solution.
It is possible to navigate quickly and intuitively with just one thumb or digital-pad in a two-stage-tree.