Defend your spreadsheet from rogue formulas, runaway charts, and the dreaded REF errors.
Cash: 200
Lives: 20
Wave: 0/12
Score: 0
Rank:
Cellie grinning
Sum-thing is coming. I can feel it in my cells.
Select a tower type above, then tap a free grid cell to place it. Tap a placed tower to upgrade or sell it.