can't find the star in Skymning 4th phase (alternative)

Hi!
i'm about to complete the game in alternative mode, but i'm missing one single star, the one in Skymning, 4th phase. The level where you get 'trampolined' by a boulder.
In easy mode it's quite obvious, but in alternative i'm lost.
Anyone can help?
thanks!

they call it 'the power of posting'
i call it giving up hope
i found it!



[mod]Next time please use our spoiler tags: [spoiler]secret stuff here[/spoiler] instead of the text spoiler-warning. Thanks![/mod]