I think this is a good start to an interesting game: I don't know dominoes very well and I think it's an unique exploration mechanic.
I liked that I could hover over the dominoes to see which ones I could use and which ones I could not.
Things I would liked to have while I was playing:
- Colored pips: pips for a 1-tile are color1, pips for a 2-tile are color2, etc.
- This is just an easy way to visualize what you have to work with: You have lots of this color: they go together.
- Always start with at least one double tile.
- The double tiles seem to be the best way to branch out: starting out with one let's the player do more things.
- New idea: there are '?' markers in undiscovered areas: maybe these could be unlocked in rooms. Excavate to here to find something neat.
I found 6 relics and upgraded my dumbbell to +4.
Nice job! Looking forward to more!