Good electronic vibe all along! I really enjoyed Transformation in the depth, musically it is a very well crafted track and plus, story wise, you can feel something important happens there! It wonderfully works in the playlist :)
I agree that for a rythm based game some tracks might seem a bit repetitive but overall you had a coherent universe build up. It helps with immersion and the audio quality you provided reinforce that feeling. I don't know how you treated your sounds but what I find very cool is that they may not instinctively sound waterish but each time I felt like evolving underwater, so good job on that!
Thank you for that OST with some bangers :)