A rule flashes. A word flashes. Does the word fit the rule? Tap ✅ or ❌ before the bar runs out. Answer fast and build a combo streak — the timer gets quicker the hotter you get!
Pick how many questions make up Level 1. Each level after that grows by the next step (e.g. start on 10 → Lv.1 = 10, Lv.2 = 20, Lv.3 = 30…). Changing this restarts your session.
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🧠✨ What is Brain Sharpness?
It's your accuracy for the current level only — it resets to 100% every time you level up. Each wrong answer chips away at it; the fewer mistakes you make before finishing the level, the sharper you stay. The Combo badge shows your active score multiplier for answering several in a row correctly.