What do the numbers and colors mean? A tutorial would help probably.
Also how do you check if its a valid word? And do you make sure there are always valid words on the board?
If you really want to develop this further then I'd suggest focusing more on making it relaxing and cozy. Maybe its just me, but right now trying to find a word on the word and not seeing it is just giving me anxiety :D And there is not enough of a dopamine hit when I do find a word.