You must tap the right target at [TARGET] show.
For example the following case:
The [TARGET] are "blue" as [COLOR] and "circle" as [SHAPE],so you must tap (3) or (4).
If you missed target or time is over, the game will be over immediately.
But the [TARGET] shows [COLOR] too at the center arrow, so the true target is (4).
If you tap (3), the game will not be over,but your score will be reduced to half.