The AW-01 circles are actually cones and cylinders, their true nature visible by dragging the bottom edge up. The cone-shaped ones are the correct ones.

The AW-02 circles open their eyes when moused over. The correct circle will open its mouth and scream at the cursor when clicked on.

Because the correct AW-03 circle is actually a shadow, the cursor darkens when inside.

That's "minute" as in "small", not "minute" as in "60 seconds". AW-04 circles move choppily when dragged. The correct circle is the one that makes smaller "jumps".

Dragging across an AW-05 circle makes multicolored scratches. The correct circle is rotating quickly, which makes the scratches look like multicolored circles.

The AW-06 circles rest on a plane; drag up to reveal the truth. The correct circle is the one that's further away (it's bigger so it looks the same size from that distance).

Each AW-07 circle is a swinging cover that can be dragged around and up. The correct circle has a blue button behind it that turns the lights on and off when clicked. TURN THE LIGHT OFF BEFORE MAKING YOUR CHOICE!

This one's either easy or impossible, depending on your preparations. If you left the lights off when you inspected the AW-07 circles, the correct AW-08 circle will light up when moused over. If you didn't, they're indistinguishable, requiring you to pick one and cross your fingers.

AW-09 circles are lenses. Drag them over the text. Concave lenses make things appear smaller; convex, bigger. Thus, the one that makes the text appear smaller is correct.

AW-10 circles shrink when clicked and held. The correct one is the one that shrinks faster.

AW-11 circles are hard circles concealed in fluffy shells that make them look the same size. Poke them gently with the cursor; the fluffy shell on the correct circle won't give as much.

To test the AW-12 circles, drag the ceiling down to squash them. The correct circle will spring back to shape when the ceiling is raised; the incorrect circle won't.

The glass used to make the correct AW-13 circles is fragile. Hold the mouse over each one for a second or so; the correct one will crack.

Drag both AW-14 circles. The correct one will leave a trail.

The correct AW-15 circle is a display screen; the incorrect one is a camera. When you mouse over the incorrect circle, your cursor will be displayed on the correct one.

That's "counterclockwise" as seen from above. Each AW-16 circle will freely spin if clicked, but only in one direction. The correct circle will spin only if its right half is clicked, and halt if its left half is clicked; the incorrect circle, vice-versa.

Be careful! AW-17 circles are superimposed on inverted space. The correct circle is the one that says "Right" when moused over. For the purposes of matching the buttons to the circles, ignore the reversal.

AW-18 circles are pendulums on invisible chains. Drag them up and watch them swing. The correct circle's swing has a sharper arc, created by a shorter chain. It also swings more quickly.

Drag left and right. The correct AW-19 circle will have stars and changes of color visible inside it.

Not to be confused with MW-20, "Which Do Not Press?", although the principle is similar. When you mouse over either AW-20 circle, the text will become jittery and the screen will flash red. If it's the incorrect circle, it'll stop after two or three seconds; if it's the correct circle, it won't, but pick fast before the screen explodes!