Just finished the game, got all the relics and the 'good' ending...but, how is getting trapped within the Grip a good ending?

It's the most fun I've had playing a demo this week. I must admit I was worried because first person parkour tends to give me motion sickness really fast but it's not at all the case here although the first person perspective still feels odd as the camera seems very close to the ground. I have been playing for an hour more or less and I went looking for a relic to unlock an area gate but I find myself stuck. I can't seem to find a way out of my position even with the trace grip that goes pretty far. I kno...

The cursor spins constantly and is making me sick seeing it spin while trying to play also a bit distracting.

got all the achievement beside that one, any hint? do i need to replay the full game

Looks interesting however it's a shame the Grappin is lacking essential settings such as resolution options and appears to be hard locked at 1080p which doesn't look great on most monitors and TVs these days (support for multiple aspect ratios and not just 16:9 would be great), very limited FPS cap options going only from 30-120 without a unlimited cap option, no Field of View (FOV) slider, no rebindable controls etc....