I thought the visuals were great, and never too dark for me. Controls were easy to get the hang of, and the active/inactive platform changes were easy to understand and predict right away. The controls felt good in almost every way, but the deceleration on the player makes things feel a little slippery, and the trickier jumps were a little frustrating for me because of it.
The platforming sequences are really well designed, but being stacked on top of each other means if you miss a jump you might lose minutes of progress and have to redo it all, which gets worse the farther up you get. This might be by design, but I struggle with games that make me do the same thing after I've been successful at it just to get back to the part I'm stuck at. Checkpoints would really help, and they could even be optional.
I know I already mentioned the visuals, but just wanted to add that the art style and sound design were really good and immersive, and established a strong mood right away that pulled me in. I couldn't make it to the end past the really tiny platform jumps, but I'm going to play more when I have a chance later because I'd like to see more.
I didn't notice any tile tearing when I played, but I had a problem with it developing my game too, and this is what fixed it for me (it's for one of the 2018 versions of Unity but I'm using 2019.3.15 and it worked fine):
youtube.com/watch?v=kbx528-lnoU