Tap a node to set its level. In this tree every node follows the nodes before it: it needs at least 1 level in each and can't go above the lowest one until they are complete. Lowering a node lowers the ones below it; raising it never raises them. If you already finished it in the game, "Complete tree" sets every node to max at once. Your progress is saved in this browser.
Values read from the game. If something doesn't match what you see, report it.