Just finished Chapter 2 (so 12 levels total)
This is bloody addictive. Generally, I felt like I was flying through levels and then patch 6 on chapter 2 kept catching me off guard. It was that first step of going through 2 + 3 that was catching me out.
The sfx progressively building each time you go through a patch number is quite satisfying.
Really satisfying and responsive controls. Thought this was pretty fun. Seems ideal for mobile.
Well worth checking out for those that enjoy Flow, and other similar games.