Sony going to release on September 21, 2016 in Japan the DEMO version of the GRAVITY DAZE 2 PlayStation 4 game.
The DEMO will be available from the Japan PSN But only for the PS Plus users and only for 5 days.

You can play any time as you wish with the DEMO but the game going to turns off on September 26, 0:00 (2016). More information coming soon. “Normal” DEMO version release is unknown.