Domino Drop

Goal Fill the gaps, push the first domino and ring the bell.

1. Drag a domino from the box onto a mark. Or tap it, then tap the mark.
2. A domino reaches as many steps as it has dots. Taller ones reach further.
3. A domino tips the next one only if it is at most one size bigger.
4. A marble rolls down to the next shelf. Dominoes can reach across a gap.
5. Tap the first domino to push. Ring the bell on the first push for three stars.