Each daily grid holds 16 letter tiles arranged as 4×4, hiding four words. Drag or tap adjacent tiles to trace a word, then submit it. Valid words clear their tiles from the grid.
Every submitted word costs one fuel cell. Your budget is the number of words in the solution plus a few spare cells, so wrong guesses are what cost you stars.
Clear all 16 tiles to win. Run out of fuel first and the reactor melts down. Use Compact to let remaining tiles fall together, and Undo to step back a move for free.