Arena brain games

The Arena is where you sharpen your mind in short bursts. Every game takes one or two minutes, every right answer pays a little Dopamine, and a perfect game pays a bonus.

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01How every game works

• Each game starts with a How to play screen. Choose Play solo or Play with a friend · live.
• Timed games start after a 3 · 2 · 1 countdown.
• Every right answer pays +0.01 Dopamine. A perfect game — no mistakes — pays +0.1 extra.
• Leave early and you keep everything you’ve earned so far.
• Playing a round (with at least one answer) counts towards your daily streak.
• Your personal best is your best single round. Beat it and you’ll see NEW PERSONAL BEST.

02The five games

Speed Math

Sixty seconds. Answer as many sums as you can. A sum appears — type the answer with the keypad or your number keys. The next sum comes up by itself as soon as you’re right; no Enter needed.

• Addition, subtraction, multiplication, division and percentages. Answers are always whole numbers.
• It gets harder every few questions.
• Press Space to skip a sum — skipping isn’t a mistake here.
• Perfect game: at least 10 right, none wrong, played to the last second.

Pattern Series

Five sequences, two minutes. Spot the rule, pick what comes next. For example: 2, 4, 6, 8, … → 10.

• Four options each. Sequences use numbers, letters or both, and each one is harder than the last.
• Pick with a click or the keys 1–4. A wrong pick shows you the right answer straight away.
• Perfect game: all 5 right.

Memory

Watch which cards light up, then find them again. A few cards light up, flip face down, and you tap the ones that lit up, in any order.

• Seven rounds that grow: more cards to remember, a bigger grid and less time to look.
• No clock — take your time choosing.
• One wrong card ends the run, but you keep everything you earned. Each round you clear pays +0.01.
• Perfect game: all 7 rounds cleared.

Target Number

Five targets, two minutes. Build each one out of five tiles. Pick a tile, a sign (+ − × ÷), then another tile, and keep going from your total until you hit the target.

• Whole numbers only, nothing negative, and division only when it comes out exact.
• Each tile can be used once. You don’t have to use them all.
• Every target can be made. Undo with ⌫, restart a target with R.
• Perfect game: all 5 targets built.

Word Rush

Sixty seconds of words. Find the synonym, catch the misspelling, or unscramble the word from its meaning.

• Words start easy and get harder.
• Every word shows its meaning after you answer, and the round ends with a list of them all — the ones you missed first.
• Here a skip does count as a miss.
• Perfect game: at least 8 right, none wrong or skipped, to the last second.

03After each round

The result screen shows a verdict (from “Needs practice” to “Perfect game”), every question with the right answer, the Dopamine you earned and your best. Choose Play again, see the Leaderboard, or Play live against a friend.

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