No tremeble with VR (Advanced)

Brief descriptions and operations of this game are as follows:-
(1)This game may not run on some devices because these devices lack one of the sensors used by this game. It is terribly sorry!
(2)This virtual game simulates a rolling ball on the board.
(3)Game will start if click on the screen. Similarly, clicking on the screen can stop the game during play.
(4)The smart device shall be placed flat and horizontal before starting the game.
(5)For rolling the ball, it is necessary to lean the device back forth and right left. The speed of rolling depends on the slope.
(6)Please be aware the nature phenomenon of static friction and acceleration.
(7)Each level has 1~5 small pits and 0 ~ 4 large pits
(8)It will upgrade after ball is rolled into every small pits.
(9)Leaning with a large slope, it will roll the ball out from a small pit when you want to roll this ball to another small pit.
(10)To approach the small pit, the slowest speed and the smoothest way are necessary.
(11)Sound will be alarmed and a green circle will be displayed to indicate the ball is rolled into the pit.
(11)This game will be terminated if the ball goes into large pits.
(12)There are 25 levels in total.
(13)The past time is recorded on the left up corner of the screen.
(14)Two spirit levels, slope of horizontal and vertical, locate in the middle up and right of the screen, respectively.
(15)Double-clicking the screen can switch the background sound on and off. Clicking and holding a while on the screen can display the score list.