Fixed. The issue was that the grid used non-existent `decoy*.png` files, causing blank cells. Now all 9 cells use the 9 actual images (`img1.jpeg` through `img9.jpeg`), with a random subset marked as "your Valentine" (correct answers) and the rest as decoys.

**Next Ideas:**
1. **Add a subtle border/tint to decoy images** — give decoy cells a slightly different filter so the puzzle has a visual hint layer
2. **Add a countdown timer** — give players 15 seconds to pick the right images, adding urgency and replayability

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