The Sun Temple Escape

So, i just finished it. The truth is that i had to look at the walkthrough after i only had the knife, and i had tested it everywhere. I didn't even know if i had to drag and drop it to use it or if i could just click on it and then click on where i wanted to use it. So, in the walkthrough i saw where i had to use it and i had already used it there, for the same reason, just maybe a bit to the left or to the right. Anyway, after that it was pretty easy-the puzzles were pretty straight forward. But because of the lack of descriptions the game feels unfinished and the fact that the difficulty is just because of the lack of descriptions, i'll give it 2/5

How do I even start this game??? I'm stuck on three knobs and I have no idea how to move from there I am absolutely clueless where is the description? maybe iv missed it i don't know but I have no idea what to do here..