Nostalgia Jungle

I'm up to the part about the riddle on the rock, I stand to the south of the waterfall and nothing happens. What am I supposed to do?

ok first of all
humm
been some time now
there are 3 riddles right?
I remember one was with the mirror or clock
there should b a spot with a circular pond/lake
now go stand where the 6 should be on a clock
and run around it counter clock wisethe second one is with the Sun if I recall
go down to the river go on the deck and look West, where the sun rises, stay there for ~5 seconds and you should have solved the second riddlethe last one should be easy, it's running, before you do the last be sure to save, there's a boss
go to the waterfall activate the countdown and run through the mud (there should be mud at a place) after running through the mud, there should be a way to go through the gate

Thanks!