I am playing the game and I like the idea a lot, but I have to say that it was difficult for me to see the points under each box with which you have to match the color (after finding it I have seen that it was explained in the how to play video, so it's probably my bad).
Another thing is that being a pixel art letter and in small size, some letters have been a bit difficult for me to read.
For the rest, in general, I would encourage you to move on with the game, it seems like a good idea and may have potential!