Numbers Stack

Numbers Stack is a free, incredibly addictive number puzzle where you connect colored dots to merge numbers. Each dot has a color and a value, and you can stack same-color dots vertically or link adjacent dots horizontally to create higher numbers. Plan your moves to manage limited space and chase big combos that earn more points.

Key features include three difficulty levels (2, 4, or 6 rows), automatic save, a clean pastel design with calming music, leaderboards and achievements, hints for vertical connections, and no permissions required. Best of all, Numbers Stack is free to play and enjoyable for players of all ages, from kids to adults.