Count the Cubes

How to play

1. A stack, for a moment

   Cubes are stacked on a small grid and shown for a few seconds. Then they are gone and the question is the same every time: how many were there?

2. Nothing floats

   A cube that sits high up must have cubes underneath it — you cannot see them, but they count. That is the whole game: what you see is less than what is there.

3. Type the number

   Tap the digits and confirm. The right answer scores a point; a wrong one shows what it really was, so the next round starts with the same eyes.

4. One new obstacle each round

   First the stacks grow and the look gets shorter. Then the stack turns, then it slides across the screen, then a second colour joins in that you do not count — and finally a cube turns up while you are still counting.