tree technique? looks a bit abnornal, the bottom comes out too much imo. looks pretty nice though good job.
there is a waterfall, but it isn't in the pics cuz im stupid at angles, but I will be adding a cave for sure.
Not bad but I would add a little more like water more trees maybe and the bridge you made from the brench is creative but it doesn't look good i would change the brench to go down and just build a bridge not connected to the tree it will look much better trust me.