Billy Bug 1 Cali and the Coordinate
https://www.mathplayground.com/logic_brixx.html
https://www.mathplayground.com/slidingblock.html
https://www.mathplayground.com/logic_red_block_returns_2.html
https://www.sheppardsoftware.com/math/geometry/congruent-similar-game/
https://www.turtlediary.com/quiz/congruent-shapes.html
https://wordwall.net/en-us/community/shapes/congruent