An advanced physics engine is what can make a game that looks like something from the 90s feel brand new. Where's the Water is a great example of this phenomenon in action. Its cute cartoony visuals could have come from a higher-resolution Super Nintendo game, but the water physics mark it out as a modern classic. In each level, there's a waterspout and a friendly-looking alligator looking to have a bath. Your job is to fill the gator's tub with water.
Between the spout and the tub are obstacles you can't dig through, and layers of softer earth that you can. Where's the Water is about working out where you need to dig to get the croc's plumbing sorted. Its gameplay encompasses many elements of the best casual games. The water physics lends play a fluidity - geddit - that is part of what makes titles like Angry Birds and Cut the Rope so inviting.
This is probably Disney's very best iOS game - the only real rival being the similarly physics-obsessed Jelly Car 3. Where's the Water currently includes 140 levels, and judging by how these things work these days, you can be sure that more will be added in updates over the coming months.
Yet another classic physics-based puzzler for iPhone and iPad, and one that's as inviting as a warm bath.