Specifically, the new mode is sponsored by company General Electric to celebrate "Gravity Day", and features no time limits or restrictions along with the addition of a "gravity button" which shuffles the dots based on the the angle and tilt of the phone.
Betaworks executive Paul Murphy spoke about the new mode to The Verge:
Gravity mode will arrive this Sunday on Android and iOS and be available for one week. Betaworks' SVP of product, Paul Murphy, describes how it will work. "You can think of it like a 'zen' mode for Dots. No timers, no restrictions, just connect as many dots as you'd like. If you get stuck, you can click the gravity button, which acts as a shuffler. To make it happen, our team implemented a physics engine so the dots appear to fall with gravity and move based on the angle of the phone."The game has been very popular on iOS, hitting #1 in 20 countries. Dots is a free app and can be downloaded on the App Store. [Direct Link]