throw away snow

why can`t i clear the quest even thouhgh i threw snow from a high place like in the picture? just looking at it, it looks like it`s over 335merters? and do you want to save your game or ruin it? if you keep changing the existing method, users will have a hard time adapting, so people will leave and you will lose trust. i`ve barely adapted to the existing construction method, but changing it agaoin? and why is the explanation so lacking? when i fist played the game, isolved most of it by reading the guide, but now the quests are not explained properly and it is very difficult to play.