Before continuing, I will give you all lots of credit in general. This is a well constructed game overall with a great soundtrack and mostly solid content. I will always have a place in my heart for these types of games and please don't take any of this as anything other than constructive criticism - the overall quality of stuff you put out is very good and I hope you keep going in the future.
With that being said, once you get the yellow key and move onto the next part of the game (which will remain unnamed to prevent spoilers - the devs will know what I am talking about), it becomes completely illogical. The "hint" provided in the piece of reading material you find along your way is not indicative one single bit of how you're actually supposed to apply it. It's not a tune or sound when it comes to to apply it in-game, so why say it is, or even act as if the player can use it in that fashion? Also, how does one logically die in said area in nighttime conditions...? The directional "hint" given is completely irrelevant as well, as traveling in that direction will always bring death because it's a multitude of directions in a specific order (with limited chances and forced back to start each time), not just one as the hint indicates.
This brings back lots of memories of puzzles like "throw spider at dead butler with no hint - just use until something works after 75 deaths" from Uninvited.
That really did turn me off to the game honestly, because as much as I love Uninvited, I loathed the handful of completely ridiculous and illogical puzzles in that game. Puzzle games should be winnable without walkthroughs or obscenely cryptic hints. The puzzles previously were very tough in many cases, but none of them were like this which is why I still had the determination to keep trying and got through them all until now. Hints so cryptic that they will require a walkthrough in most player's cases should never be a necessity in games like this, as you only truly get to play them as intended once.
I may pick it back up again in the future, but that's gonna be it for me for now. That type of gameplay isn't engaging - it just makes you lose interest very quickly. All of the others puzzles were challenging but fair. If this is an indication of how the game ends, it's gonna be tough to find the motivation to finish it.
My honest, overall opinion (hey - this is the kind of feedback you guys ask for) is that this game is solid, but missed the mark in this very vital way. I think you did so much better in terms of a well constructed puzzle game overall with Infested. It may not have been as flashy or have as nice of a soundtrack (fantastic soundtrack in Spectacle, by the way - especially the outdoors track. Catchy stuff!), but the puzzles clues made sense (even if slightly confusing to begin with).
I'd probably give the following number scores to each game.
Spectacle - 7/10
Infested - 10/10
As I said originally though - don't stop! I'm one person sharing one opinion and not everyone will approve of everything you make. Your attention to detail and quality productions I've seen so far will ensure I will be interested in the next game you create. I just wish some things had been done differently in Spectacle - it started off amazing and then lost it's spark rather quickly for a player like me who's not interested in needing a hint system to beat the game.