The science, plainly

A circle will appear after a random delay. Press SPACE (or tap) as fast as you can when it does. Don't anticipate — early presses don't count.

Press SPACE (or tap) for the GO signal, but withhold your response for the NO-GO signal. Be fast, but accuracy matters more than speed.

A color word appears in a colored ink. Choose the INK color, ignoring what the word says. Use the buttons or keys 1–4. Go as fast as you accurately can.

Symbols appear one at a time. Press SPACE (or tap) when the current symbol matches the one shown N positions earlier. N is shown before you start.

Watch the squares light up in order, then tap them in the same order. The sequence gets longer as you go.

A target symbol is shown with a row of symbols. Press YES (or tap left) if the target is present, NO (tap right) if absent. Go as fast as you accurately can.

An equation is shown with an answer. Press YES (F / ←) if it's correct, NO (J / →) if it's wrong. Speed and accuracy both count.

Paper lanterns light up one at a time in a growing order. When they go dark, tap them in the exact order they lit. Each round adds one more. A wrong tap ends the run.

Beams cross the dark. Solid beams are true signals — click them before they leave. Dashed beams are false — ignore them. The watch is long; stay sharp as it speeds up.

A rhythm plays. When it goes quiet, tap it back as exactly as you can — the timing is what matters. Each round adds a beat.

Figures light up and sing, one at a time, in a growing order. When the music box winds down, tap them in the same order. Watch and listen — both carry the pattern.

A voice names a colour and a target shape is shown. Click the one object that matches BOTH — the colour you hear and the shape you see. Others match only one, to mislead you.

Each flower sings its own note as the garden wakes. Then a sound returns — tap the flower that made it. The garden grows each round.

A scene of floating objects sits at different depths. Tap them in order from nearest to farthest. The scene rotates slowly, so judge depth, not screen position.

A field of near-identical objects fills the space; exactly one is subtly different. Find and tap it before time runs out. The difference shrinks each round.

Keep your pointer on the moving orb (the lightning) while you listen. Press SPACE whenever you hear the deep target tone (the thunder). Both jobs at once — that's the test.

A colour word drifts toward you, written in a conflicting ink. Choose the INK colour, not what the word says, before it reaches you. Use the buttons or keys 1–4.

You control two moons — one with your pointer, one with the ← → keys. Slide each away from the incoming debris on its side. Keep both alive.

A pattern of glowing cells appears briefly, then fades. Recreate it by tapping the same cells. The pattern grows more complex each round.

A block slides back and forth. Tap to drop it onto the stack — overhang is trimmed away, so each drop must overlap the one below. Build as high as you can.

Objects rest in their places for a moment, then the room is cleared. One at a time, place each object back where it belongs. Closer counts for more.

A flash and a beep play on each trial — sometimes together, sometimes slightly apart. Press only when they are truly simultaneous. The gaps get smaller as you go.