Bringing the concept of duality to the humble platformer, Team Snore's 'In Between' has been released into the Windows Store. The challenge is simple... help Jack get his pillow back from the evil [night] mare that has stolen it.

From the directory listing:

Help jack get his pillow back form the evil mare, chasing him in different dreams and nightmares, in between his sleep and wakefulness. In Between is a puzzle platformer game. The main mechanic in this game is teleporting between the 2 rooms existing in each level. You have to solve puzzles and do some platforming to reach the goal (the pillow) in each level with jumping and teleporting.

in practice you can see the second room shaded out just behind the action on screen, and a quick tap of the button will allow you to switch rooms. Got a wall in the way? Switch to the other room, walk along a bit, and switch back.

Here's the principle of going around a wall by visiting the second room.

It's a nice twist on the platform concept, with echoes of games like Sega's Crush, or Nintendo's Super Paper Mario - both titles where you can change the environment to play, rather than simply move through it. Level design is key to this sort of game, and on first impressions Team Snore have done a good job to keep the challenge varied and interesting.

Available in both a free and paid for version, you can download In Between from the Windows Store now.