Test your concentration and skills with challenging gameplay. Tap the correct color in normal mode or the wrong color in reverse mode. Earn bonus points for quick taps. Compete on a global leaderboard.
Test by repeating star patterns on tiles. Track progress with Leaderboard and Achievements. Challenge friends via Center. Exercise limbic system and medial temporal lobe.
Align gemstones to match colors and clear levels by grouping more than three. Play without internet access. Features include multiple level types and no move limits. Ads may appear during gameplay. Data is stored locally and deleted upon removal.
Test knowledge of US with two modes. In 50 Challenge, name all within 10 minutes. In State Identification, guess highlighted on a map. Track progress and review answers after each round.