I know you finally made it, Jack.
A little hint for those who'll come later & may have problems here:
There is no need for jumping or sprinting. I timed sliding down to reach the first tile as soon the spikes were down. The rest is moving and stopping from tile to tile following the sequence of the spikes. It took me several tries but it's not that hard doing it this way.

me again. I have the stone of earth after the spike-challenge. I reached an area where I pushed a stone on a trigger-tlie. I don't know what effect it had and how I can return to the lake. Any hint?

forum effect: found the hard to see path on the other side...

next problem...
What is the effect of placing the old dagger?
The camera-hint only lasts for a millisecond and is not helpful at all.
(This could have been sorted out by testing )

In the middle of the cave in front of the water, there is a hidden shaft in the floor with stings on the ground, in there was a closed door, which is open now...

....in which I fell and died. I thought it was only a trap that I avoided before by accident....
Thanks Tom!

Yes, it is hard to see that there is a door in the shaft, and even harder to see, that it is open now...

...and it's even harder to see if you have no flares anymore....
I backflipped by intuition...

I hope it's for the last time in this great game.
I have the stone of air and the stone of earth. I'm back at the water-wheel and have no idea how to proceed to the last stone. Maybe we already have a description here but as there is no given order to find these stones I cant find a hint in the postings made so far that pushes me back on my way...

EDIT: In the area where I found the skull-key is a still closed door at the top of a ladder. But I don't know how to open it.....

EDIT: NVM. Found the shootable fence in the corner of the mentioned area

My walkthrough is finished since three weeks, so if you are stuck, and nobody can answer at the moment, you can have a look at it...

Thanks, Tom, just finished it.
But I'll take a look at your walkthrough for I missed one secret.

And: Congratulations to the author! Great work!

What does the switch inside this door do? I have the Fire and Earth tablet thingies but I'm missing the last one and it's really annoying.

Why don't you read the walkthrough? ...

iirc, it opens the door to the Snake Gem