Recs.
Updated
Where's My Water? is the first game in the 'Where's My' puzzle series made by Disney, and while a sequel has been released, the first game is still considered one of the best puzzle-physics game on the App Store.
Specs
Pros
Pro Challenging puzzles
Where's My Water offers a bunch of different levels with challenging physics-based puzzles. Thanks to a great variety in the level design and different elements that interact with the water, the game succeeds to stay fresh. Some of the later levels are also quite extensive and complex, which results in a challenging and satisfying gaming experience.
Cons
Con Screen navigation isn't always perfect
Some levels are bigger than the screen on your device, which means you'll have to scroll up and down constantly in order to see what's going on in a level. A scroll-bar is positioned on the left, which seems like an odd choice for right-handed people.