Ever since Stranger Things took over our pop culture world last summer, we’ve been kind of obsessed about parallel dimensions again. The “Upside Down” has been a catch phrase when talking about weird occurrences in our world and how maybe this is not the real one. A new game now available for your Android devices is not exactly connected to the Netflix series but it does deal with switching between two worlds, one of which is literally just under us. Welcome to the world, or rather, worlds of Hop Swap.

This platform puzzler has a simple but complicated concept: you hop and swap to jump through the two worlds that are literally parallel to each other. When you hop, the ground becomes the sky in the other world, and vice versa when you hop back to the other world. In between these two worlds, you get to solve puzzles and find all the gems that you can to win the game.

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To be able to move around and between the two worlds, all you need to do is to swipe up, down, left, and right. The game uses “cutting edge retro pixel graphics” which makes the gameplay even more amusing. It is simple to understand but of course maneuvering between the two worlds becomes a bit more complicated as the game progresses.

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You can download Hop Swap from the Google Play Store for free. There are in-app purchases available, as well as direct links to social networking sites.