I really like how you can move through walls, instead of not being able to as well as being punished for touching them. It means I can move through sections quicker but at a fair price.
I did find it hard to read the text because of the colours, and I think the rotation is too slow, like I'd prefer to be able to be swift.
I really love the sound effects! My favourites are picking up the points (reminds me a ps1 scooby-doo game I used to play) and the sound of hitting a wall.
Just realised this, but even if it is pre-existing audio, they are good choices, and that's valuable.