Every board is a real Sudoku
Each puzzle is generated with exactly one solution and is solvable by logic alone. No guessing, no dead ends, no "try a number and see".
A difficulty curve, not a difficulty setting
Boards get harder inside every zone and again across all ten, so the next villain is always a step up from the one you just beat.
Hints that teach
A hint names the technique the board actually needs next and shows you where it applies — not just the answer.
Bosses change the rules
Every tenth villain brings a gimmick. Diagonal Law, Sudden Death, Flawless Duel — the grid is the same, the terms are not.
Free all the way through
Every level is reachable without spending anything. Energy refills on its own and cosmetics are bought with coins you win by playing.
Ten zones. Ten bosses.
One hundred illustrated villains, each with their own board and their own opinion of you.
Queen Treacle
Candy Kingdom
The Grand Regulator
Clockwork City
Pharaoh Amenhotet, the Unburied
Desert Necropolis
The Ringmaster
Haunted Carnival
The Frost Monarch
Ice Realm
Temple Mother Ashkala
Jungle Ruins
The Architect
Neon Cyberpunk
Captain Hex Morrow
Pirate's Cove
Admiral Vonstrade
Space Pirates
The Storm Sovereign
Storm Peaks