Black Tiles - Touch The White Piano Keyboard

It's an addicting game that test your reflexes,speed, stamina and accuracy.
How to play:
1. Tap on the black tile, and move up
2. Tap on white tile, then the game is over.
There are five modes to choose.
-classic mode
you can tap the lowest black block as soon as possible.
Measure the time required to advance 50 steps.
-challge mode
If the 50 steps forward at a specified time，extra time will be given. Different number of steps to complete, different rewards.
[50-100) : +12s
[100-150) : +11s
[150-200) : +10s
….
[350 - ) : +5s
-Classic Enhanced
It is similar to the classical mode, except that the increase of blue blocks, you must click twice to advance
-whac-mole
As fast as possible within 30 seconds to hit all of the black blocks. Started slowly on the back will be faster.
- Sense mode
Tap fast in first 5 seconds, then continue touch,but stop before 10s.