COINs

Color Sort, Object Sort, Shape Sort · Updated Apr 12, 2026

About COINs

The game hinges on a single decision: which coin to move and where to place it to form a sequence of ten identical numbers. Drop a coin onto an empty line or stack it on another of the same value, and watch the cascade—ten of a kind merge into a single, higher-value coin. That moment of placement, when you choose whether to extend a chain or start a new one, defines every move. The goal is clear: reach the number 10 coin, but each step forces a trade-off between building toward the next merge and keeping the board manageable. There is no undo; the layout you create is the only path forward.

Watch coins transform as you line up ten of the same number, merging them into a higher-value coin. Strategically move any coin to any spot—empty lines or other stacks—to create those perfect sequences. Drop in new coins whenever you need to keep the chain going. Your goal is to craft the elusive number 10 coin! It’s a satisfying puzzle of organization and timing, where smart placement and quick thinking lead to a higher score.

How to Play COINs

Drag a coin from the board or the incoming queue and drop it onto any empty line or onto a stack of coins that share the same number.
When ten coins of the same number line up in a stack, they merge into a single coin of the next higher number, clearing space on that line.
New coins appear periodically; you may choose when to drop them onto the board to continue building sequences.
Continue merging coins to increase their values, aiming to create a coin numbered 10, which completes the puzzle.
If the board fills up with no empty lines left to place a new coin, the game ends.

Game Features

Coins start at number 1 and merge upward through ten distinct values toward the number 10 coin.
Any coin can be placed on any empty line or onto a stack of coins with the same number, regardless of position.
New coins arrive in a queue, giving you control over when to introduce them to the board.
Merging clears a stack and frees up its line for future placements, rewarding efficient stacking.
The scoring system tracks each successful merge, with higher-value coins contributing more points.

Frequently Asked Questions

What happens when I make a wrong move and block a line?

There is no undo, so a blocked line can only be cleared by merging the offending stack or moving its coins to another compatible stack. Plan placements to avoid dead ends.

Can I move a coin from the middle of a stack?

Yes, you can drag any coin from any position in a stack and place it onto an empty line or onto another stack of the same number. This allows reorganization without waiting for the top coin.

Do coins of different numbers ever merge?

No, only ten coins with the exact same number will merge into the next higher number. Mixing numbers prevents merging and wastes space.

What is the target coin value to win?

The ultimate goal is to create a coin numbered 10. Once you merge ten 9-value coins into a single 10 coin, the puzzle is solved.

Is there a limit to how many new coins appear?

New coins appear periodically, but the game does not specify an exact count. The board's capacity (number of lines) determines how many coins you can manage before running out of space.