BInvisibility Wall

The game appears 2 rows of parallel bricks, from low to high, each row of 1 of 2 bricks will have spikes, after appearing a period of time depending on the number of bricks will hide all the thorns, the player must rely on memory to jump the right brick without spikes, every time reach the highest brick to a new level, more rows of bricks, when standing for about 5 seconds without jumping the brick underfoot will disappear

* Victory condition: compare with the mode's high score

* Losing condition: jump on spikes or jump off

* How to divide LV:

- Normal: same as above

- Difficult: the time of hidden spikes is 1/2 of normal.