I played the first half of the game before going to bed one night.
I didn't know what to expect, and I was pleasantly surprised.
The game perfectly captures what it's like to be a small shapeshifting triangle drifting between abstract planes to 140 beats per minute of ambient techno music. It was a mesmerizing experience.
The puzzles are simple but clever. Parts of it are very challenging, but well-placed checkpoints keep you grooving to the beat even when you make a mistake (except in the "hardcore" second half of the game). However mind-bending and challenging the puzzles got, the overall feel of the game was very therapeutic and flowy.
The screenshots don't look like they make any sense - even to me, but they all make sense at the time. You have to play it to understand.
The game ended when I was ready for it to end, but it is a short game, and part of me wishes there was more. My hopes were raised when I discovered the hardcore levels, but after a few attempts, my frustration got the better of me.
I didn't try it, but I recommend trying the game after getting high first.