Superb mechanics, with a difficulty that ramps up as levels progress. For all its beautiful visuals and sounds, this game can be bang-your-head-on-the-wall frustrating, but I expect that in a puzzle game.
Mechanics - 5/5 - Every time I thought I had figured out the game, it threw something new and challenging at me. Each new mechanic fit it well with the old, and I felt like I understood more nuances of the old mechanics as I continued to play.
Visuals - 5/5 - Beautiful, clear, simple.
Sound - 4.5/5 - Overall quite pleasant, but the constant sound of running water isn't actually the most peaceful thing to listen to. If anything, it just made me want to pee.
Story - N/A
Overall - 5/5 Difficulty - Hard
Completed - 53 Levels (~2 hrs)