Outside World may resemble Monument Valley, with its isometric perspective and surreal, isolated walkways, but it's really its own game.

You play as a girl name Kyrsten, trying to navigate her way home through an unfamiliar world.

Kyrsten will walk wherever you tap, but some places she can't reach. That's where her ghost friend Jaynie comes in.

Jaynie can float around to areas where there is no walkway, finding vital clues for solving the puzzles in each area.

In some places, you might need to match colors to a compass, teleport around with portals, or match a key code to open a door.

Outside World is only 79p / 99c and contains no ads or in-app purchases.

You can buy it now on Google Play.