tl;dr An extremely interesting puzzle game about moving through time anyone should check out if you like puzzles (includes some flashes in final chapter so fair warning to people who have epilepsy symptoms)
Story - The gardens between is a story of 2 kids, you might find out more about the story then I did as you play through, however I didn't really find any noticable storyline until the very end. Since there is no words throughout it could be argured there isn't one to begin with, but because of the ending I'm giving story as a whole is 8/10
Difficulty - The game is definitely challenging, while some levels come naturally, others require stopping time, or new mechanics that are not specifically stated. I only googled 1-2 out of around 20, so not too too hard, just requires some outside of the box thinking. 7/10
Controls - There's only 2 things, Movement (forward/backward) and Interaction, which makes controls really easy, however since you aren't actually moving the characters you're moving time itself, sometimes you might get confused and try to go up or left moving the character, instead of going right to move time forward. Interaction is very straightforward, but the girl can only do lanterns, and the boy can only do levers, which makes it a little annoying, but still very straightforward. However since the mechanics aren't really taught overall 7/10
Sound - The background noise paired with the music makes excellent combo, sound is overall just amazing throughout. This is definitely an ost that I would listen to outside of the game, especially the credits song, but it can only be played in game, as it is not released anywhere, which is kinda annoying as it is definitely amazing and brings the whole thing together. Simply because you can't find the credit song on many platforms, sound is getting 9/10, when it is easily 10/10.
Overall - I finished the game in a little over 3 hours, across 3 days, doing basically an hour a day, going very much at my own pace, and it was worth the whole thing and more. I would gladly spend more time on this or enjoy a longer version. There is around 8 worlds with 2-3 levels per, you can save and quit after any level, making it very easy to play on a time crunch, as each level is only about 5-15 minutes long. If you are adapt with puzzles this game will likely only take an hour or two, but it could easily stretch to 3-5 or maybe even more. But get your tissues as you might cry at the ending. Final score 8/10 or 4 stars.