Triangle Sort!

Tap a block. Nine marbles pour into the chamber, funnel down onto a moving belt, and ride it past four color lanes. Every marble that matches an open block drops into a socket. Fill them all and the level is done.

WHAT YOU DO

Only the pieces touching the bottom row start unlocked. Tapping one opens its neighbours, so the board unfolds as you play. The puzzle is the order you tap in — not how fast you tap. There is no timer and nothing chases you.

WHY IT BITES

The belt is a closed loop with fifteen slots. A marble that matches nothing does not vanish — it keeps circling, holding a slot. Fill the belt with marbles that fit nowhere and the level deadlocks, and you restart.

Every level holds exactly as many marbles as there are sockets to receive them. No spares. No margin. A wrong order is recoverable right up until the moment it isn't, and knowing which moment that was is the whole game.

FEATURES

- 30 hand-built levels, each one checked to be solvable before it ships
- Nine marble colors, spaced for readability and checked against the three common forms of color-vision deficiency
- Real physics — marbles pile, roll and settle, they are not on rails
- A camera under the machine looking up, so you watch the marbles come toward you
- One-handed portrait play
- Works offline

Triangle Sort is a puzzle about routing and capacity. If you like sorting things into the right container and you want the container to be able to run out, this is that.

Questions or a bug to report: legal-tax@arizonags.com