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Thank you for giving the game a shot, I'm really glad to hear you enjoyed it!! 

The 2x2 cursor is an interesting suggestion... on paper, I do wonder how Kurukuru Twinkle's mechanic of swapping columns and rows in groups of two would impact building more precise shapes of circuits as opposed to simply matching blocks by color. That being said, I understand finding the cursor rotation to be a bit inelegant of an approach...I definitely plan to experiment with ways to further streamline the block-swapping process down the road

To follow up on the other reply, a match entails practically any arrangement of same-color blocks that connect with each other on the horizontal / vertical axes and form a closed shape. A two-by-two square is the simplest arrangement, but it could also be a three-by-three square, a two-by-three rectangle, or any form of abstract polygon... just so long as they're comprised of the same color and you can draw a continuous line from any one block in the circuit back to itself by following the path you build.

Thank you for pointing this out! Should hopefully be fixed now