A few bits of advice that may help:
Did you die before you got to the statue that looks like Death? Don't restart the level, as the achievement only tracks deaths while at the river.
While juming, keep looking down. Doing so will help you get closer to the top of the stream pillars. It will also spawn the platforms beneath you.
Don't try to go past any pillar. You simply will not make it, take them one at a time.
Lastly: if you are jumping and feel like you screwed up the jump somehow, spawn a pad beneath you to save yourself and try again.