Build the tower
Every brick is the sum of the two beneath it. Pick a tower height — the taller the climb, the bigger the apex.
Game modes
Daily Tower Done today
Same seeded tower worldwide, one shot a day. Log your time.
Duel Bot
Climb your half of the bricks first. Wrong digits cost +2.5s.
Timed Practice
60 seconds, as many towers as you can. Chain solves for streaks.
Solo Practice
No clock, no pressure. Three heights, best times saved.
Friend 1v1
Coming soon — private rooms arrive with the live API.
Random Match
Coming soon — get matched with a stranger instantly.
Tower height · applies to every mode
Global Daily Tower
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How it works
1Each brick equals the sum of the two bricks directly beneath it
2Given bricks (paper) are fixed — only the blanks are yours to fill
3Pencil marks let you note candidates; toggle Notes (✏) to jot them
4Duel: you and the bot each own half the bricks — first side done wins