PopStar with Undo

Highly addictive game. Once you start, you cannot stop.

There are two modes.

Game rule
Classic:
- Tap two or more blocks, which are same color
- No time limit, once you meet target you can promote to next level

Endless:
- Tap two or more blocks, which are same color
- Tap the blocks as more and fast as you can
- The more block you tap once, the more time will be added
- When level up the time drain will be faster
- Once time up it will game over

Score rule:
Score = block x block x 5

Bonus rule of Classic mode:
bonus = 2000 - block x block x 20

Features:
- Undo Button
- 9 different color blocks, you can choose random color or fixed color