You're on the right track, but you may need to think outside the box to figure it out!
Did it, wow that's tricky. And tbh I never would've figured it out, if you hadn't mentioned somewhere, where to look (can't remember, where I read that). It's kind of unreasonable, but then again it's not like the player's enjoyment depends on whether or not they can solve this ultimate puzzle. So yeah, loved the game. 5/5 and I look forward to your next project :)