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Why doesn't that go there?

Polycubist is a falling-block puzzle in three dimensions, with one more hiding in plain sight. You'll see it fit. It won't.

Free in your browser. No sign-up to start.

Polycubist title screen

It starts like the falling-block game you already know.

Pieces drop into a well. You turn them and place them. Then a piece that obviously fits doesn't, and you start to suspect the well has more sides than you can see.

Working out where that hidden dimension is, and how to use it, is the whole game. It's a good workout for 3D spatial thinking, and it gets harder in ways you won't see coming.

  • 12 levels
  • 8 of them free
  • Global leaderboard

One level is the fastest way to see what we mean.

Level 1 cleared.

Make a free account to keep going. Levels 2 to 8 are free, and your scores go on the leaderboard.