Fissle is a free daily word puzzle. Every day you get a 4×4 grid of 16 letters hiding four words. Trace a word, submit it, and the tiles split away — clear all 16 tiles before your fuel cells run out.
Efficiency wins: you start with a fixed fuel budget and every submitted word burns one cell. Clear the grid with fuel to spare and you earn up to five stars, keep your streak alive and climb the daily leaderboard.
There is also a Themed 5×5 grid each day, a Speed Streak mode unlocked by fast clears, and live 1v1 challenge races against a friend.