First off, let me explain my rating system:
1 star = Bad enough it can't be saved
2 stars = Really bad, but interesting/good concept
3 stars = Was good but problems/bugs are in the way to make it fun/better
4 stars = Really good, but I still found things that can be improved/fixed
5 stars = I found no fault with it
I collected 60 pages, obtained the block-form, and opened 2 locked doors, with around 1 hour of gameplay.
Overall Fun - 4/5
Very simple gameplay, and the precision-platforming mechanics are quite fun (and frustrating).
The shapeshifting was really cool, especially when needed to be used to get past a "watchtower/spotlight" not trying to spoil too much.
Collecting pages, finding keys, and opening doors was interestingly fun.
The game was easy to pick up, but with the lack of tutorial or explanation the game was difficult to start.
I found the "Fools-Trap" really funny. Thank you for that.
Art & Graphics - 3/5
I understand the art style but...
I found it difficult at first to know, what is a passable wall? What is a spike? But this took time to get used to.
But the usage of only two colors, and low resolution shows how well you know your pixels.
Controls & UI - 3/5
I had no way to know the controls, I first thought this was a controller only, until suddenly a key started the game.
I had to spam my keyboard to find out what key did what.
I found it understandable but also slightly painful due to gamer-habits where I couldn't jump when holding a key and pressing space-bar. I could only do one. And this caused many unintentional deaths.
I found the block-form controls slightly confusing when I press space+W to jump "up" but nothing happens, and when I let go of said keys, I deform and die. This is also connected to gamer-habits.
Sound & Music - 3/5
All audio was quite well-done, and I only had one issue.
The high-pitched 8-bit noise hurts my ears, and the nature of the sounds made it feel like I was going to get a headache from it.
Other than that, there was no issue.
Closing thoughts -
This was a nice game, and I hope I would be able to download it for offline play.
I see this game as a casual-precision-platformer.
It wouldn't be something I would actively play, but it would be something I want to revisit and play casually.
I do hope this review was helpful in some way and I wish you good luck on the game and that you have a wonderful day.