Hello, Vlad!
Thank you so much for playing my game.
In my opinion, you were the first to review it on YouTube)
The hint for passing this boss is below in the screenshot.
you need to slip under the Hunter (a spider that grabs you from above) when a stone blocks his view.
Then a hint will appear on what to do next.
I hope this will help you move on.
P.S. Do you think I should make the clue more obvious?
Can I post your video on my social networks?