I genuinely enjoyed this. It is a metagame type but one that targets the UI, requiring the player to go back and forth between the game space and the (perceived) UI space to solve the riddles. While metagame titles have been around for a good while already (at least as far back as The Tower, I believe), this one makes the ability to play itself the game. Yes, meta to the core.
I did rely on the Walkthrough for some bits, but the solutions I missed on my own did not seem too far of a reach. The fact that a walkthrough was included is greatly appreciated and shows that the devs really understand their game's relationship with the audience. And for me, the length of it felt just right as well.
The visual polish on this is great and is even incorporated into some of the riddles. Normally, I cap presentation scores at 3 stars if one of either art or audio used pre-existing assets, but I actually never got the audio to work. As such, I will just treat it as not having audio and score the art accordingly, with an extra bonus for incorporating graphical fidelity itself into the gameplay (it's faked, but the idea itself counts to me).
Ultimately, the best compliment I can pay it is that I did not play and review this as part of the obligatory 25 on the queue list. I was first intrigued and then became invested in the experience. The game caught and held my attention on its own. Great work!