Nokia

Using the magnifier, you can pinch or slide to zoom in, and tap to focus an image. You can also freeze a viewfinder to improve viewing, save images, use a flashlight and add filters.

The unsuspecting café-goers’ received new Lumia 1520 and 620 phones, as well as Xbox One consoles, Surface 2 Pro tablets, Office 365 and Skype subscriptions.

It’s the same game that’s been beloved since it was born in Moscow in 1984: Rearrange falling blocks, called Tetriminos, in the stack below by rotating them into place. If you do it correctly with no gaps, you score major points as you wipe out entire rows and keep going.

Entries can be anything water-related, “from puddlegrams to water droplets, beaches, water balloons and rain,” writes Anna Kurkijärvi in a blog post. “Previously Instagrammed pics qualify, too, as long as they’ve been taken with a Lumia and you tag them #LumiaWater.”