Fill the gaps. Light up the sky.
Drag number tiles into a crossword of sums until every line across and down holds, and each solved board becomes a constellation. 96 boards in eight skies, from simple adding to answer-first lines and three-number sums, plus a Daily Chart, the timed Comet Rush leaderboard, a shop and trophies.
Fill every gap in a crossword of sums so each line across and down holds, and turn each solved board into a constellation across eight skies, plus a Daily Chart and the timed Comet Rush leaderboard. Drag a number tile from the tray into a gap, or tap a gap and then a tile; tap a placed tile to take it back, and use Undo, Clear and free Hints when stuck.