When you're not solving puzzles directly, you can move your avatar with your left thumb and look around using your right. Most of the puzzles you have to solve involve the classic 'flow' gameplay. But of course, as you advance, the puzzles will get more and more difficult.
Your final objective in The Pillar is to escape from the mysterious world you find yourself in. For that, you have to interact with a series of shining pillars, where more and more puzzles will appear.
The Pillar is a really great first-person puzzle game that, despite it's quality, offers a game experience that's a little too 'inspired by' The Witness. In other words, it's a decent game with good graphics and a nice soundtrack, but it definitely doesn't stand out for originality.
Requires Android 4.1 or higher