Great game
Things the game does well
Art
Music (decent)
Story (descent)
Concept (cool concept with the portals and all)

Where the game fails is
Level design (very linear)
Difficulty spike its horrible like for a casual gamer i would avoid this game.
Game drops inputs and that is really bad for a game thats based on precise timing inputs.

Don't buy it to play casually!

Very good and challenging game but some achievements failed to synchronise preventing the good reward feeling..

Some part is really very difficult. It provide you a microsecond to pass. I can't reach the end of the game.

This game barely passes as a metroidvania in my eyes. You do get new abilities which allow you to access new areas, but all the levels are very linear and there's very little exploration. Storytelling is poor, NPCs are boring. Most of the platforming challenges are very easy and others are frustratingly difficult. But the biggest issue was playing this game on steam deck where you constantly get FPS drops. 80% of all my deaths was because of FPS drops. Very frustrating.
And I finished the main storyline in under 2h....

Honestly, there is more good than bad, but I found myself frustrated with things more often than I would have liked and for that it gets this middling review.

This is metroidvania. It's characters are cute and the art looks pretty good in general. I know what I can interact with and thing are distinct from other things. There are a few short animated cut scenes, and although the frame rate on them is on the lower side, they still convey the feelings the game is going for. Nothing wrong with the graphics, but it doesn't stand out to me either.
The music doesn't stand out either, though some parts are very loud. I think they needed to balance the audio a little better. No dialogue is spoken. Everything is text, which is fine by me for a game like this. The problem is, everyone talks in vague terms and I often got bored of the 2-5 text boxes each character had for me before I was done reading it. The small plot is fine in general, but again, not much in this game stands out.
The gameplay gave me issues. The game has a terrible habit of dropping inputs on your jumps. It's really bad when you get double jump and have to combine a second jump with other movement options and then you just don't get a second jump. The game eats it and its gone. I know I lose my first jump if I walk off a platform or fall off a wall, but the game doesn't clearly show when you are starting this movement and I died many times due to this awkward design. Also, having L1 being one type of control and R2 being the other type is just plain inexcusable. It's clunky to have it designed that way when R1 is not used for anything all game long.
The game teaches you how to use the abilities you get, most of the time. Though there was one time that I got to a boss and had no idea how to even hit it because the game never bothered to explain that mechanic. I ended up stumbling onto it randomly because nothing would work. The game would just put roadblocks like that in your way.
The difficulty spikes really got on my nerves towards the end. You platform through an entire section, learn what the game is teaching you, and then you have to do all of that while not having any time to look at the situation and figure out how to use it. You have to go as fast as possible and even that is just barely fast enough. Some of the platforming sections would be leagues more difficult than the rest of the game and while the game teaches you how to use the abilities, putting them together in these ways would often feel unfair.
Finally, my last gripe is with some puzzles having very confusing requirements to complete. I got lost many times because I thought I needed a new ability when all I needed was what I had, but the timing had to be perfect to get it. Even with perfect timing, it would often not look like you could make a jump or get to an area, but then it works anyway. Meanwhile, I went back and re-explored everything trying to find wheat I missed so I could move on. There was just never a clear path laid out that you need this ability at this point and you gain it during the last sequence. You can just go everywhere, end up with 4 dead ends and then have to go back and find the area that it looks like you can't get to and go that way to find the next ability in a dead end.
It's worth playing on sale, but not unless you are into this style of game already. It's not something that will get you into the genre. For a game that does, try the Ori games, or the classics that created the genre Metroid and Castlevania.

Too sad that the dialogues are boring and everything in the nature is trying to jumpscare me to death (or simply murder me to death)

seems a fun game but performance issues (5 fps?! on a 4080) make it impossible to play

too much button mashing required combined with challenging timing. either is ok, both is not fun.

After a cruel disappointment of Imp of the sun and its harcore boss, I was starting to enjoy this smart metroidvania thinking "finally something chalenging but not harcore".
Sweet summer child.
No hardcore boss ok, but hardcore platform al of sudden (required for story of course), that requires perfect timing and pixel placement and portal activation.
Seriously, those devs must be sadistic. Give a bit of margin dammit, not too much, but not zero.

At the time of this review I'm maybe 2/3 through the story, but at this point I don't even know if I want to finish this game.

If you are looking for a difficult precision platformer with sometimes borderline malicious design then this is for you.

If you want to buy this because you were looking for a metroidvania then reconsider.
This game only has very few aspects of metroidvanias, and most things can be found on the first run through an area.