■ □ Rules □ ■
- Tap one block, it will turn to the opposite color so do the blocks around it.
- Make all blocks turn to dim color.
■ □ Hints □ ■
- When you doubtful, you can use the hint function.
- Each hint will consume one hint opportunity.
- If the remaining hints fewer than five times, every five minutes a hint will be recovered.
Are you ready?!