Chain Reaction: Logic Puzzle

**Can you make every creature smile?**

Every creature needs exactly the right number of same-coloured neighbours around it. Tap a tile to change its colour and watch the happiness spread across the board in a chain reaction.

Easy to learn in ten seconds. Hard to put down.

**No download, no account, no timer.** Click and play.

### What's inside

- **300 levels** across five zones — Garden, Forest, Mountain, City and Cosmos — that grow from 3x3 to 7x7

- **A daily challenge** with a streak to keep alive

- **Three stars per level** if you find the shortest solution

- **13 achievements** to hunt down

- **Hints** when you get stuck

- **English and Spanish**

Made by one person. If you get stuck on a level, tell me which one — I read everything.