CLICK: place domino T: t̲urn 180 S: s̲tarter domino R: r̲estart and open editor X: ex̲terminate ;) LEFT: turn l̲e̲f̲t̲ RIGHT: turn r̲i̲gh̲t̲ UP: change zoom likewise DOWN: change zoom likewise SPACE: play I'll add saving and loading later.
Inspiration from some other scratcher. Code by me.