I didn't really get why/how new trees were planted, they seemed to appear by themselves :)
Also didn't get what "out of control" text in the bottom right meant, I seemed to still be able to click things.
Graphics are pretty basic, but I guess explain what each thing is. Music and sounds are OK.
I think game lacks a bit in depth, as it was just enough to stay out of the robots saws and hit them with the stick to survive, maybe adding some more mechanics would be good.