Dominoid is a tile-falling puzzle game similar to Puyo Puyo, but with a difference in how tiles are combined to clear them. Instead of connecting four tiles of the same color, you have to make rings of tiles of the same colors (the minimal ring being a square of two by two tiles). When you make a ring, all tiles of the same color as the ring and connected to the ring are cleared, and also all tiles inside the ring.

Currently, the game only offers an arcade mode similar to Tetris the Grand Master, in which you have to reach level 10 and awarding you grades and badges depending on how well you played the game. The speed of tiles are increased each time you level up.

The game is interesting, typically the kind of game easy to understand and hard to master. I wonder if more playing modes are coming in future releases, notably a versus mode.