Mahjong Tiles - Don't Tap It

Watch your step, DONT TAP ANY WHITE MAHJONG TILE. This is the core rule in this additive game.
Is it easy? Everyone can handle it, but not everyone can handle it well. What about you?

Tap on the mahjong tiles to toward the goal.
The quicker you tap, the faster the path moves!
Tap on a blank mahjong tiles and the game is over.

There are three modes in the game:
-Classic mode, get 50 mahjong tiles as soon as possible.
-Arcade mode, try your best to tap the mahjong tiles as many as you can, and do not miss one.
-Zen mode, try your best to tap the black tiles as many as you can in 30 seconds.