The atmosphere here is absolutely wonderful - the ambient music and the muffled sounds of the spheres rotating as you move, the alien textures - it all works really well to lend the game a strange, dreamlike feeling that I was happy to get lost in.
It felt a little awkward mechanically, with the slow movement speed and odd jump - it works really well to add to the impression of a dream (and the main character is carrying a boulder so makes sense they'd be slow!), but it made missing jumps and walking back quite frustrating.
Really enjoyed the environmental puzzle in the second sphere, where I realised that my position affected the rotation of the spheres and could be used to affect the hinged platform