I've not played lots of this. But what I have played, has impressed me. I'm not big on puzzle-platformer types, but I adore this game regardless.
The Soundtrack is absolutely wonderful. It's so ambient and it REALLY fits the game. It genuinely makes you feel like you're solving a puzzle. There's some interesting, occasionally creepy sound-effects [childrens laughter] that definitely adds to the very odd atmosphere. There's no real way to decribe the kind of atmosphere it generates. It's simply unique.
The Artwork/Aesthetic. It's gorgeous. Vibrant colour themes and pleasant contrasts. It's quite simply an interesting game to look at.
The gameplay is, not really for me. The game can get difficult very quickly, which is always an issue with puzzle-platformers. Certainly some levels are more intuitive than others. But it consistently provides a challenge. I imagine, at higher levels, it must feel fantastic to glide through the levels executing each move required perfectly. Sadly, I very rarely - often accidentally - replicate this feeling. It's usually the moment I realize how fluid the game feels that I die! The main issue for me is that when you do die, it really slows the gameplay. What is fluid when executed perfectly feels sluggish when you die, as you often re-spawn stationary, or with little momentum.
But I can't stress enough how polished it is, especially for an indie title. There's some lovely written commentary provided in-game as you pass certain obstacles. If you love puzzle-platformers and unique games, you'll like this game. Even if you don't, I'd argue it's worth buying for the soundtrack and aesthetic in-game. It's simply beautiful. Fully recommended.