Puzzmo
puzzmo.com
Daily puzzle site with crosswords, SpellTower and new puzzle games.
New York indie game designer behind SpellTower, Really Bad Chess, Good Sudoku and Puzzmo
Zach Gage is an independent game designer based in New York City who makes deep games that are easy to get into, often by taking a classic game and changing only its tools or starting conditions. He is best known for SpellTower, Really Bad Chess (2016), which gives each player a random set of pieces, Sage Solitaire, Good Sudoku, and Knotwords, a clue-less crossword puzzle made with collaborator Jack Schlesinger that later came to Apple Arcade as Knotwords+.
Gage and Schlesinger also co-founded Puzzmo, a daily puzzle site that combines classic crosswords with Gage's own games and new titles, with Schlesinger building many of the puzzle generators. Gage runs a newsletter and Discord for players and shares his design thinking in interviews and AMAs.
puzzmo.com
Daily puzzle site with crosswords, SpellTower and new puzzle games.
stfj.net
Word-finding puzzle game, his best-known title.
stfj.net
Chess variant where each player starts with a random set of pieces.
stfj.net
Sudoku app with tools that teach advanced solving techniques.
stfj.net
Crossword-style logic puzzle without clues, made with Jack Schlesinger.

FeaturePanic· 2026


InterviewHey, Good Game· 2025

FeatureChris Remo· 2024

TalkGDC Festival of Gaming· 2019

TalkGDC Festival of Gaming· 2018

FeatureMashable Brand X· 2015

InterviewDtoid TV· 2012
Six Colors · Interview · 2024
Hey, Good Game · Interview · 2024
Apple Podcasts · Podcast · 2024
Game Developer · Interview · 2023
Real Time Strategy · Podcast
His games include SpellTower, Really Bad Chess, Sage Solitaire, Good Sudoku and Knotwords, and he co-founded the daily puzzle site Puzzmo.
Knotwords was made by Zach Gage and Jack Schlesinger.
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