Loved it! I hope you can expand it. Some suggestions:
- add a reset button
- the meaning of "adjacent" may not be clear for everyone, I wasn't sure until I saw the pieces in action, some graphical hint would be nice
- save game option (I used the web version, not sure if it's more limited)
- more ways to overcome the row/column restrictions
- when we add more epitaphs, I was expecting that every time I used one, I would get a new secret. Apparently there are only a few and each makes a message appear only once, they all look the same so a random one would show a new secret, the others do nothing after the first use. Find a way to make this clearer in the game
This can be a very addictive game with more balanced mechanics. I'd love to see a plot or more story elements in it. I'll be following it :)