This is an app filled with potential. If you swap the portals with horrors and scary images, you've got yourself a new app. Seriously, try Infinight. The atmosphere, music, lighting, environments, user interface, and overall story are absolutely wonderful.
Infinight is not a fast-paced game - so much so that likely some gamers will find frustration - but it is evocative and challenging. Puzzle fans who like a slice of atmosphere to go with their quest for the goal should enjoy what Infinight has to offer.
It's only a buck, and I wouldn't hesitate to call it one of the most interesting puzzle-adventure games on the App Store. If you're tired of shallow arcade-style games and want a game with a good, interesting story, Infinight is more than worth its asking price.