Spatial brain puzzle

See beyond
the blocks.

Count blocks stacked into all kinds of shapes to sharpen your sense of space — even the ones tucked away neatly behind others.

2 game modes
Daily challenge
Free to play
HIDDEN BLOCKS home screen
Two ways to play, one brain teaser

Pick a mode and start
training your spatial sense.

Every stage is a clean, textbook-style front view of stacked cubes. Read the depth, picture the full 3D shape, and answer before the timer runs out — earning stars, gems, and a daily streak as you climb.

Mode 1

Count All

Count the whole stack — including every block hidden behind the ones you can see.

  • 1Check each column's height from the top.
  • 2Remember: no gaps between the blocks.
  • 3Add up every column for the answer.
Count All gameplay
Mode 2

Count Hidden

A tougher twist — find only the blocks hidden completely behind the others.

  • 1Picture the stack's full 3D shape.
  • 2Find blocks covered on every visible side.
  • 3Count those hidden blocks for the answer.
Count Hidden gameplay
A quick guide

Learn each mode in seconds.

Clear, illustrated tips show you exactly how to read a stack before you dive in.

How to Count All
Count AllAdd up the full stack, hidden blocks included.
How to Count Hidden
Count HiddenSpot only the blocks sealed behind others.
Ready when you are

Find every block —
even the ones you can't see.

Download HIDDEN BLOCKS and put your spatial sense to the test, one stack at a time.